Omar Galárraga, a health economist and health services researcher, is the Director of the International Health Institute (IHI) at the Brown University School of Public Health, where he is a tenured Professor of Health Services Policy and Practice. At Brown, he also serves in the steering committee for the Population Studies and Training Center (PSTC), on the advisory committee for the Center for Latin American Studies (CLACS), and the advisory board for the Data Science Institute (DSI).
His research uses insights from health and behavioral economics with a special focus on HIV treatment and prevention, health systems, and applied health econometric analysis. He evaluates economic-based interventions using experimental and rigorous non-experimental methods; his contributions have appeared in over 130 publications in health economics, public health and health services research. He currently serves as Multiple Principal Investigator on 3 NIH-funded R01 projects: (1) Harambee: Integrated Community-Based HIV/NCD Care & Microfinance Groups in Kenya [5R01MH118075] measures the effectiveness, mechanisms, and cost-effectiveness of an HIV differentiated care model integrating community-based care into existing microfinance groups; (2) Impact of Prescription Caps on Health Outcomes in People Infected with HIV [5R01MH122301] evaluates how prescription cap policies imposed on low-income Medicaid beneficiaries impact treatment adherence and can have adverse effects on health and allocation of public funds; (3) Empirical testing of a widely available insurance-based monetary incentive program for exercise: A randomized trial [1R01CA262894] is an RCT to test different financial incentive programs to promote physical activity among low-active adults.
Dr. Galárraga serves as Associate Editor for Health Economics; as standing member of the NIH Science of Implementation in Health and Healthcare (SIHH) study section; and as an appointed member of the Office of AIDS Research Advisory Council (OARAC). He conducts research in Ecuador, Ghana, Kenya, Mexico, South Africa, and the U.S. in collaboration with community and academic partners.
Harambee Study: differentiated HIV care and microfinance in Kenya
Galárraga Research Lab
PrEP Seguro study: Antiretroviral-based HIV prevention in Mexico
LinkedIn
Twitter @Prof_Omar_G
Google Scholar Page
ORCID Profile
Press Release for iSAY: incentives for South African youth (Oct. 2020)
Press Release: HIV & economic Incentives (Lancet HIV review) (Oct. 2019)
Press Release: Curbing alcohol to fight HIV can save money in Kenya, April 2017
Press Release: Incentive level for reducing HIV risk (March 2013)
Press Release: Study models ways to cut Mexico’s HIV rates (October 2014)
Press Release: HIV risks high in Mexico City (November 2014)
| Wilson-Barthes, M., Steingrimsson, J., Lee, Y., Tran, D.N., Wachira, J., Kafu, C., Pastakia, S.D., Vedanthan, R., Said, J.A., Genberg, B.L., Galárraga, O. "Economic Outcomes Among Microfinance Group Members Receiving Community-based Chronic Disease Care: Cluster Randomized Trial Evidence From Kenya." Social Science & Medicine, 2024, pp. 116993. |
| Yang X, Galárraga O, Cao W, Lin H, Cao F, Chang C. "Financial incentive interventions for smoking cessation among Chinese smokers: study protocol for a cluster randomised controlled trial." BMJ Open, vol. 14, no. 4, 2024, pp. e080344. |
| Sawe, Sharon Jepkorir, Mugo, Richard, Wilson-Barthes, Marta, Osetinsky, Brianna, Chrysanthopoulou, Stavroula A., Yego, Faith, Mwangi, Ann, Galárraga, Omar. "Gaussian process emulation to improve efficiency of computationally intensive multidisease models: a practical tutorial with adaptable R code." BMC Medical Research Methodology, vol. 24, no. 1, 2024, pp. 26. |
| Tituaña, Allpa, Herrán, Keren, Galárraga, Omar, Palacios, Iván. "How to decrease teenage pregnancy: rural perspectives in Ecuador." Frontiers in Public Health, vol. 12, 2024. |
| Galárraga, Omar, Wilson-Barthes, Marta, Chivardi, Carlos, Gras-Allain, Nathalie, Alarid-Escudero, Fernando, Gandhi, Monica, Mayer, Kenneth H., Operario, Don. "Incentivizing adherence to pre-exposure prophylaxis for HIV prevention: a randomized pilot trial among male sex workers in Mexico." The European Journal of Health Economics, 2024. |
| Tao J, Gu M, Galarraga O, Kapadia J, Martin H, Parent H, Chan PA. "Long-Term HIV Pre-Exposure Prophylaxis Persistence and Reinitiation in Connecticut from 2012 to 2018." Population health management, vol. 27, no. 4, 2024, pp. 267-274. |
| Lyons, Carrie, Ching, Jennifer, Tran, Dan N, Kafu, Catherine, Wachira, Juddy, Koros, Hillary, Venkataramani, Maya, Said, Jamil, Pastakia, Sonak D, Galárraga, Omar, Genberg, Becky. "Social, economic and food insecurity among people living with HIV in Kenya during coinciding public health and environmental emergencies: a mixed-methods study." BMJ Public Health, vol. 2, no. 2, 2024, pp. e000836. |
| Galárraga, Omar, Quijano-Ruiz, Alonso, Faytong-Haro, Marco. "The effects of mobile primary health teams: Evidence from the Médico del Barrio strategy in Ecuador." World Development, vol. 181, 2024, pp. 106659. |
| Restar, A., Wilson-Barthes, M. G., Dusic, E., Operario, D., Galárraga, O. "Using stated preference methods to design gender-affirming long-acting PrEP programs for transgender and nonbinary adults." Scientific Reports, vol. 14, no. 1, 2024. |
| Reichheld, Sarah J., Pellowski, Jennifer A., Wilson-Barthes, Marta, Galárraga, Omar. "Barriers and facilitators to scaling up access to HIV pre-exposure prophylaxis among key populations: A qualitative study of the incentive-based PrEP Seguro program in Mexico." SSM - Qualitative Research in Health, vol. 4, 2023, pp. 100357. |
| Harrison A, Mtukushe B, Kuo C, Wilson-Barthes M, Davidson B, Sher R, Galárraga O, Hoare J. "Better Together: acceptability, feasibility and preliminary impact of chronic illness peer support groups for South African adolescents and young adults." Journal of the International AIDS Society, vol. 26 Suppl 4, 2023, pp. e26148. |
| Chivardi, Carlos, Sosa, Alejandro Zamudio, Galárraga, Omar, Sosa-Rubí, Sandra G. "Efficiency, quality, and management practices in multidisciplinary and traditional diabetes healthcare services in Mexico." Health Services and Outcomes Research Methodology, 2023. |
| Kibel, Mia, Nyambura, Monicah, Embleton, Lonnie, Kiptui, Reuben, Galárraga, Omar, Apondi, Edith, Ayuku, David, Braitstein, Paula. "Enabling Adherence to Treatment (EAT): a pilot study of a combination intervention to improve HIV treatment outcomes among street-connected individuals in western Kenya." BMC Health Services Research, vol. 23, no. 1, 2023. |
| Apedaile, Dorothy, DeLong, Allison, Sang, Edwin, Ayuku, David, Atwoli, Lukoye, Galárraga, Omar, Hogan, Joseph, Braitstein, Paula. "HIV incidence and death among orphaned and non-orphaned children and adolescents living in family-based settings in western Kenya: a prospective cohort analysis." The Journal of Pediatrics, 2023, pp. 113410. |
| Rivara, Anna C., Galárraga, Omar, Selu, Melania, Arorae, Maria, Wang, Ruiyan, Faasalele-Savusa, Kima, Rosen, Rochelle, Hawley, Nicola L., Viali, Satupaitea. "Identifying patient preferences for diabetes care: A protocol for implementing a discrete choice experiment in Samoa." PLOS ONE, vol. 18, no. 12, 2023, pp. e0295845. |
| Chen, Kevin, Wilson-Barthes, Marta, Harris, Jeffrey E., Galárraga, Omar. "Incentivizing COVID-19 vaccination among racial/ethnic minority adults in the United States: $209 per dose could convince the hesitant." Health Economics Review, vol. 13, no. 1, 2023. |
| Tran, Dan N., Ching, Jennifer, Kafu, Catherine, Wachira, Juddy, Koros, Hillary, Venkataramani, Maya, Said, Jamil, Pastakia, Sonak D., Galárraga, Omar, Genberg, Becky L. "Interruptions to HIV Care Delivery During Pandemics and Natural Disasters: A Qualitative Study of Challenges and Opportunities From Frontline Healthcare Providers in Western Kenya." Journal of the International Association of Providers of AIDS Care (JIAPAC), vol. 22, 2023, pp. 232595822311520. |
| Williams, David M., Bohlen, Lauren Connell, Dunsiger, Shira, Ayala-Heredia, Viveka, Griffin, Elizabeth, Dionne, Laura, Wilson-Barthes, Marta, Unick, Jessica, LaRowe, Lisa R., Galárraga, Omar. "Testing an insurance-based monetary incentive program for exercise: RCT design and rationale." Contemporary Clinical Trials, vol. 135, 2023, pp. 107382. |
| Omar Galárraga, Sebastian Linnemayr, Sandra I. McCoy, Harsha Thirumurthy, Christopher Gordon & Susan Vorkoper. "We must invest in behavioral economics for the HIV response." Nature Human Behavior, vol. July, no. 18, 2023, pp. 1-2. |
| Swartz, Alison, Maughan-Brown, Brendan, Perera, Shehani, Harrison, Abigail, Kuo, Caroline, Lurie, Mark N., Smith, Philip, Bekker, Linda-Gail, Galárraga, Omar. "The Money, It's OK but It's not OK": Patients' and Providers' Perceptions of the Acceptability of Cash Incentives for HIV Treatment Initiation in Cape Town, South Africa." AIDS and Behavior, vol. 26, no. 1, 2022, pp. 116-122. |
| DeAtley, Teresa, Harrison, Abigail, Mtukushe, Bulelwa, Maughan-Brown, Brendan, Muloiwa, Rudzani, Hoare, Jackie, Galárraga, Omar, Kuo, Caroline. "Conditional Economic Incentives for HIV Treatment Adherence: Aligning Adolescent Developmental Hallmarks with Behavioral Economic Theory to Improve HIV Treatment Adherence." AIDS Patient Care and STDs, vol. 36, no. 7, 2022, pp. 272-277. |
| Wachira, Juddy, Mwangi, Ann, Genberg, Becky, Ngeresa, Anthony, Galárraga, Omar, Kimayo, Sylvester, Dick, Jonathan, Braitstein, Paula, Wilson, Ira, Hogan, Joseph. "Continuity of Care is Associated with Higher Appointment Adherence Among HIV Patients in Low Clinician-to-Patient Ratio Facilities in Western Kenya." AIDS and Behavior, vol. 26, no. 11, 2022, pp. 3516-3523. |
| Wilson-Barthes, Marta, Braitstein, Paula, DeLong, Allison, Ayuku, David, Atwoli, Lukoye, Sang, Edwin, Galárraga, Omar. "Cost Utility of Supporting Family-Based Care to Prevent HIV and Deaths among Orphaned and Separated Children in East Africa: A Markov Model–Based Simulation." MDM Policy & Practice, vol. 7, no. 2, 2022, pp. 238146832211437. |
| Apedaile, Dorothy, DeLong, Allison, Sang, Edwin, Ayuku, David, Atwoli, Lukoye, Galárraga, Omar, Braitstein, Paula. "Effect of care environment on educational attainment among orphaned and separated children and adolescents in Western Kenya." BMC Public Health, vol. 22, no. 1, 2022. |
| Esseau-Thomas, Chrys, Galarraga, Omar, Khalifa, Sherif. "Epidemics, pandemics and income inequality." Health Economics Review, vol. 12, no. 1, 2022. |
| Wachira J, Genberg B, Mwangi A, Chemutai D, Braitstein P, Galarraga O, Abraham S, Wilson I. "Impact of an enhanced patient care (EPC) intervention on viral suppression among patients living with HIV in Kenya." JAIDS Journal of Acquired Immune Deficiency Syndromes, vol. Publish Ahead of Print, 2022. |
| Bishnu Bahadur Thapa, Xinqi Li, Omar Galárraga. "Impacts of community-based care program on health care utilization and cost." The American Journal of Managed Care, vol. 28, no. 4, 2022, pp. 187-191. |
| Johnson, Courtney A., Tran, Dan N., Mwangi, Ann, Sosa-Rubí, Sandra G., Chivardi, Carlos, Romero-Martínez, Martín, Pastakia, Sonak, Robinson, Elisha, Jennings Mayo-Wilson, Larissa, Galárraga, Omar. "Incorporating respondent-driven sampling into web-based discrete choice experiments: preferences for COVID-19 mitigation measures." Health Services and Outcomes Research Methodology, 2022. |
| Kafu, Catherine, Wachira, Juddy, Omodi, Victor, Said, Jamil, Pastakia, Sonak D., Tran, Dan N., Onyango, Jael Adongo, Aburi, Dan, Wilson-Barthes, Marta, Galárraga, Omar, Genberg, Becky Lynn. "Integrating community-based HIV and non-communicable disease care with microfinance groups: a feasibility study in Western Kenya." Pilot and Feasibility Studies, vol. 8, no. 1, 2022. |
| Huang AW, Haslberger M, Coulibaly N, Galárraga O, Oganisian A, Belbasis L, Panagiotou OA. "Multivariable prediction models for health care spending using machine learning: a protocol of a systematic review." Diagnostic and prognostic research, vol. 6, no. 1, 2022, pp. 4. |
| Kadiamada-Ibarra, Hemant, Hawley, Nicola L., Sosa-Rubí, Sandra G., Wilson-Barthes, Marta, Franco, Roxana Rodríguez, Galárraga, Omar. "Publisher Correction To: Barriers and facilitators to pre-exposure prophylaxis uptake among male sex workers in Mexico: an application of the RE-AIM framework." BMC Public Health, vol. 22, no. 1, 2022. |
| Wowolo G, Cao W, Bosomtwe D, Enimil A, Tarantino N, Barker DH, Galárraga O. "The Impact of Different Parental Figures of Adolescents Living With HIV: An Evaluation of Family Structures, Perceived HIV Related Stigma, and Opportunities for Social Support." Frontiers in Public Health, vol. 10, 2022, pp. 647960. |
| Steenland, Maria W., Short, Susan E., Galarraga, Omar. "Association Between Rhode Island's Paid Family Leave Policy and Postpartum Care Use." Obstetrics & Gynecology, vol. 137, no. 4, 2021, pp. 728-730. |
| Braitstein, Paula, DeLong, Allison, Ayuku, David, Ott, Mary, Atwoli, Lukoye, Galárraga, Omar, Sang, Edwin, Hogan, Joseph. "Association of Care Environment With HIV Incidence and Death Among Orphaned, Separated, and Street-Connected Children and Adolescents in Western Kenya." JAMA Network Open, vol. 4, no. 9, 2021, pp. e2125365. |
| Kadiamada-Ibarra, Hemant, Hawley, Nicola L., Sosa-Rubí, Sandra G., Wilson-Barthes, Marta, Galárraga, Omar, Franco, Roxana Rodríguez. "Barriers and facilitators to pre-exposure prophylaxis uptake among male sex workers in Mexico: an application of the RE-AIM framework." BMC Public Health, vol. 21, no. 1, 2021. |
| Kinney, Rebecca G., Zakumumpa, Henry, Rujumba, Joseph, Gibbons, Kevin, Heard, Anna, Galárraga, Omar. "Community-funded integrated care outreach clinics as a capacity building strategy to expand access to health care in remote areas of Uganda." Global Health Action, vol. 14, no. 1, 2021. |
| Wilson-Barthes M, Chrysanthopoulou SA, Atwoli L, Ayuku D, Braitstein P, Galárraga O. "Cost-Effectiveness of Care Environments for Improving the Mental Health of Orphaned and Separated Children and Adolescents in Kenya." The journal of mental health policy and economics, vol. 24, no. 2, 2021, pp. 31-41. |
| Thapa, Bishnu, Ossimetha, Angelina, Rahman, Momotazur, Galarraga, Omar. "Does Progress on Universal Health Coverage Explain COVID Cases and Deaths?." Health Services Research, vol. 56, no. S2, 2021, pp. 37-38. |
| Galárraga, Omar, Harris, Jeffrey E. "Effect of an abrupt change in sexual and reproductive health policy on teen birth rates in Ecuador, 2008–2017." Economics & Human Biology, vol. 41, 2021, pp. 100967. |
| Thapa, Bishnu Bahadur, Laws, M. Barton, Galárraga, Omar. "Evaluating the impact of integrated behavioral health intervention." Medicine, vol. 100, no. 34, 2021, pp. e27066. |
| Wachira J, Genberg B, Chemutai D, Mwangi A, Galarraga O, Abraham S, Wilson I. "Implementing enhanced patient care to promote patient engagement in HIV care in a rural setting in Kenya." BMC Health Services Research, vol. 21, no. 1, 2021, pp. 515. |
| Ganley KY, Wilson-Barthes M, Zullo AR, Sosa-Rubí SG, Conde-Glez CJ, García-Cisneros S, Lurie MN, Marshall BDL, Operario D, Mayer KH, Galárraga O. "Incidence and time-varying predictors of HIV and sexually transmitted infections among male sex workers in Mexico City." Infectious diseases of poverty, vol. 10, no. 1, 2021, pp. 7. |
| Genberg, Becky L., Wachira, Juddy, Steingrimsson, Jon A, Pastakia, Sonak, Tran, Dan N Tina, Said, Jamil AbdulKadir, Braitstein, Paula, Hogan, Joseph W., Vedanthan, Rajesh, Goodrich, Suzanne, Kafu, Catherine, Wilson-Barthes, Marta, Galárraga, Omar. "Integrated community-based HIV and non-communicable disease care within microfinance groups in Kenya: study protocol for the Harambee cluster randomised trial." BMJ Open, vol. 11, no. 5, 2021, pp. e042662. |
| Genberg BL, Wilson-Barthes MG, Omodi V, Hogan JW, Steingrimsson J, Wachira J, Pastakia S, Tran DN, Kiragu ZW, Ruhl LJ, Rosenberg M, Kimaiyo S, Galárraga O. "Microfinance, retention in care, and mortality among patients enrolled in HIV 2 Care in East Africa." AIDS, vol. 35, no. 12, 2021, pp. 1997-2005. |
| Salinas-Rodríguez A, Sosa-Rubí SG, Chivardi C, Rodríguez-Franco R, Gandhi M, Mayer KH, Operario D, Gras-Allain N, Vargas-Guadarrama G, Galárraga O. "Preferences for Conditional Economic Incentives to Improve Pre-exposure Prophylaxis Adherence: A Discrete Choice Experiment Among Male Sex Workers in Mexico." AIDS and Behavior, vol. 26, no. 3, 2021, pp. 833-842. |
| Davis A, Ellison J, Trivedi A, Galarraga O, Michaud J, Wilson IB. "Primary Care and Telehealth Spending Differed Across Primary Care Specialties During COVID-19 Stay-at-Home Order." Journal of General Internal Medicine, vol. 36, no. 7, 2021, pp. 2191-2193. |
| Rencken, Camerin A., Harrison, Abigail D., Mtukushe, Bulelwa, Bergam, Scarlett, Pather, Ariana, Sher, Rebecca, Davidson, Bianca J., Carrihill, Michelle, Matiwane, Mluleki, Kuo, Caroline, Galárraga, Omar, Hoare, Jacqueline. "Those People Motivate and Inspire Me to Take My Treatment.” Peer Support for Adolescents Living With HIV in Cape Town, South Africa." Journal of the International Association of Providers of AIDS Care (JIAPAC), vol. 20, 2021, pp. 232595822110005. |
| Edeza A, Galárraga O, Santamaria EK, Sosa-Rubí S, Operario D, Biello KB. "I Do Try To Use Condoms, But…": Knowledge and Interest in PrEP Among Male Sex Workers in Mexico City." Arch Sex Behav, vol. 49, no. 1, 2020, pp. 355-363. |
| Chen, Kevin, Chrysanthopoulou, Stavroula A, Galárraga, Omar. "Analysis of the impact of cash transfer programs on HIV risk behaviors in Kenya." Journal of Global Health Reports, 2020. |
| Velasco MC, Chrysanthopoulou SA, Galárraga O. "Cash Transfers and Contraceptive Use: A Regression Discontinuity Analysis." Studies in Family Planning, vol. 51, no. 4, 2020, pp. 309-321. |
| Sosa-Rubí, Sandra G., Galárraga, Omar. "Economic Incentives, Risk Behaviors, and HIV." The Oxford Encyclopedia of Health Economics, edited by Andrew M. Jones, 2020, pp. 3-volume set. |
| Were, Lawrence P. O., Were, Edwin, Wamai, Richard, Hogan, Joseph, Galarraga, Omar. "Effects of social health insurance on access and utilization of obstetric health services: results from HIV+ pregnant women in Kenya." BMC Public Health, vol. 20, no. 1, 2020. |
| Raifman, Julia, Nocka, Kristen, Galárraga, Omar, Wilson, Ira B., Crowley, Christina, Tao, Jun, Napoleon, Siena, Marak, Theodore, Chan, Philip A. "Evaluating statewide HIV preexposure prophylaxis implementation using All-Payer Claims Data." Annals of Epidemiology, vol. 44, 2020, pp. 1-7.e2. |
| Galárraga, Omar, Enimil, Anthony, Bosomtwe, Dennis, Cao, Wangnan, Barker, David H. "Group-based economic incentives to improve adherence to antiretroviral therapy among youth living with HIV: safety and preliminary efficacy from a pilot trial." Vulnerable Children and Youth Studies, vol. 15, no. 3, 2020, pp. 1-12. |
| Vernon, Frances, Morrow, Mary, Mawhinney, Samantha, Coyle, Ryan, Coleman, Stacey, Ellison, Lucas, Zheng, Jia-Hua, Bushman, Lane, Kiser, Jennifer J, Galárraga, Omar, Anderson, Peter L, Castillo-Mancilla, Jose. "Income inequality is associated with low cumulative antiretroviral adherence in persons with HIV." Open Forum Infectious Diseases, 2020. |
| Galárraga, Omar, Kuo, Caroline, Mtukushe, Bulelwa, Maughan-Brown, Brendan, Harrison, Abigail, Hoare, Jackie. "iSAY (incentives for South African youth): Stated preferences of young people living with HIV." Social Science & Medicine, 2020, pp. 113333. |
| Osetinsky, Brianna, Mwangi, Ann, Pastakia, Sonak, Wilson‐Barthes, Marta, Kimetto, Joan, Rono, Kimutai, Laktabai, Jeremiah, Galárraga, Omar. "Layering and scaling up chronic non‐communicable disease care on existing HIV care systems and acute care settings in Kenya: a cost and budget impact analysis." Journal of the International AIDS Society, vol. 23, no. S1, 2020. |
| Were LPO, Hogan JW, Galárraga O, Wamai R. "Predictors of Health Insurance Enrollment among HIV Positive Pregnant Women in Kenya: Potential for Adverse Selection and Implications for HIV Treatment and Prevention." International Journal of Environmental Research and Public Health, vol. 17, no. 8, 2020. |
| Pastakia SD, Braitstein P, Galárraga O, Genberg B, Said J, Vedanthan R, Wachira J, Hogan JW. "Preserving two decades of healthcare gains for africa in the Covid-19 era." AIDS, vol. 34, no. 12, 2020, pp. 1761-1763. |
| Galárraga O, Bohlen LC, Dunsiger SI, Lee HH, Emerson JA, Boyle HK, Strohacker K, Williams DM. "Small sustainable monetary donation-based incentives to promote physical activity: A randomized controlled trial." Health Psychology, vol. 39, no. 4, 2020, pp. 265-268. |
| Nocka, Kristen, Raifman, Julia, Crowley, Christina, Galárraga, Omar, Wilson, Ira, Tao, Jun, Chan, Philip, Chan, Philip. "1278. Assessing Statewide HIV Pre-exposure Prophylaxis Implementation Using an All Payer Claims Database." Open Forum Infectious Diseases, vol. 6, no. Supplement_2, 2019, pp. S460-S461. |
| Galárraga O, Sosa-Rubí SG. "Conditional economic incentives to improve HIV prevention and treatment in low-income and middle-income countries." The Lancet HIV, vol. 6, no. 10, 2019, pp. e705-e714. |
| Huang, Shuo J., Galárraga, Omar, Smith, Kelley A., Fuimaono, Saipale, McGarvey, Stephen T. "Cost-effectiveness analysis of a cluster-randomized, culturally tailored, community health worker home-visiting diabetes intervention versus standard care in American Samoa." Human Resources for Health, vol. 17, no. 1, 2019, pp. 17. |
| Osetinsky B, Hontelez JAC, Lurie MN, McGarvey ST, Bloomfield GS, Pastakia SD, Wamai R, Bärnighausen T, de Vlas SJ, Galárraga O. "Epidemiological And Health Systems Implications Of Evolving HIV And Hypertension In South Africa And Kenya." Health Affairs, vol. 38, no. 7, 2019, pp. 1173-1181. |
| Maughan-Brown B, Harrison A, Galárraga O, Kuo C, Smith P, Bekker LG, Lurie MN. "Factors affecting linkage to HIV care and ART initiation following referral for ART by a mobile health clinic in South Africa: evidence from a multimethod study." Journal of Behavioral Medicine, vol. 42, no. 5, 2019, pp. 883-897. |
| Osetinsky, Brianna, Genberg, Becky L., Bloomfield, Gerald S., Hogan, Joseph, Pastakia, Sonak, Sang, Edwin, Ngressa, Anthony, Mwangi, Ann, Lurie, Mark N., McGarvey, Stephen T., Galárraga, Omar. "Hypertension Control and Retention in Care Among HIV-Infected Patients: The Effects of Co-located HIV and Chronic Noncommunicable Disease Care." JAIDS Journal of Acquired Immune Deficiency Syndromes, vol. 82, no. 4, 2019, pp. 399-406. |
| Barker D, Enimil A, Galárraga O, Bosomtwe D, Mensah N, Thamotharan S, Henebeng E, Brown L, Kwara A. "In-Clinic Adolescent Peer Group Support for Engagement in Sub-Saharan Africa: A Feasibility and Acceptability Trial." Journal of the International Association of Providers of AIDS Care, vol. 18, 2019, pp. 2325958219835786. |
| Nadkarni, Siddhi, Genberg, Becky, Galárraga, Omar. "Microfinance Interventions and HIV Treatment Outcomes: A Synthesizing Conceptual Framework and Systematic Review." AIDS and Behavior, 2019. |
| Chan PA, Goedel WC, Nunn AS, Sowemimo-Coker G, Galárraga O, Prosperi M, Patel R, Mena L, Montgomery MC, Marshall BDL. "Potential Impact of Interventions to Enhance Retention in Care During Real-World HIV Pre-Exposure Prophylaxis Implementation." AIDS Patient Care and STDs, vol. 33, no. 10, 2019, pp. 434-439. |
| Gordon SH, Sommers BD, Wilson IB, Galarraga O, Trivedi AN. "Risk Factors for Early Disenrollment From Colorado's Affordable Care Act Marketplace." Medical Care, vol. 57, no. 1, 2019, pp. 49-53. |
| Gordon SH, Sommers BD, Wilson I, Galarraga O, Trivedi AN. "The Impact of Medicaid Expansion on Continuous Enrollment: a Two-State Analysis." J GEN INTERN MED, 2019. |
| Cole, Megan B., Galárraga, Omar, Wilson, Ira B. "The Impact of Rhode Island’s Multipayer Patient-centered Medical Home Program on Utilization and Cost of Care." Medical Care, 2019, pp. 1-8. |
| Edeza A, Galarraga O, Novak D, Mayer K, Rosenberger J, Mimiaga M, Biello K. "The role of sexual risk behaviors on PrEP awareness and interest among men who have sex with men in Latin America." International journal of STD & AIDS, 2019, pp. 956462419825944. |
| Cole, Megan B, Galárraga, Omar, Rahman, Momotazur, Wilson, Ira B. "Trends in Comorbid Conditions Among Medicaid Enrollees With HIV." Open Forum Infectious Diseases, vol. 6, no. 4, 2019, pp. ofz124. |
| Youn, Bora, Shireman, Theresa I, Lee, Yoojin, Galárraga, Omar, Wilson, Ira B. "Trends in medication adherence in HIV patients in the US, 2001 to 2012: an observational cohort study." Journal of the International AIDS Society, vol. 22, no. 8, 2019, pp. e25382. |
| Maughan-Brown, Brendan, Smith, Philip, Kuo, Caroline, Harrison, Abigail, Lurie, Mark N., Bekker, Linda-Gail, Galárraga, Omar. "A Conditional Economic Incentive Fails to Improve Linkage to Care and Antiretroviral Therapy Initiation Among HIV-Positive Adults in Cape Town, South Africa." AIDS Patient Care and STDs, vol. 32, no. 2, 2018, pp. 70-78. |
| Galárraga, O., Shah, P., Wilson-Barthes, M., Ayuku, D., Braitstein, P. "Cost and cost-effectiveness of voluntary medical male circumcision in street-connected youth: findings from an education-based pilot intervention in Eldoret, Kenya." AIDS Research and Therapy, vol. 15, no. 1, 2018, pp. 24. |
| Gantenberg, Jason R., King, Maximilian, Montgomery, Madeline C., Galárraga, Omar, Prosperi, Mattia, Chan, Philip A., Marshall, Brandon D. L. "Improving the impact of HIV pre-exposure prophylaxis implementation in small urban centers among men who have sex with men: An agent-based modelling study." PLOS ONE, vol. 13, no. 7, 2018, pp. e0199915. |
| Bautista-Arredondo S, Sosa-Rubi SG, Opuni M, Contreras-Loya D, La Hera-Fuentes G, Kwan A, Chaumont C, Chompolola A, Condo J, Dzekedzeke K, Galarraga O, Martinson N, Masiye F, Nsanzimana S, Wamai R, Wang'ombe J, ORPHEA study team. "Influence of supply-side factors on voluntary medical male circumcision costs in Kenya, Rwanda, South Africa, and Zambia." PLoS ONE, vol. 13, no. 9, 2018, pp. e0203121. |
| Cole, Megan B., Wright, Brad, Wilson, Ira B., Galárraga, Omar, Trivedi, Amal N. "Longitudinal Analysis of Racial/Ethnic Trends in Quality Outcomes in Community Health Centers, 2009–2014." Journal of General Internal Medicine, vol. 33, no. 6, 2018, pp. 906-913. |
| Cole, Megan B., Wright, Brad, Wilson, Ira B., Galárraga, Omar, Trivedi, Amal N. "Medicaid Expansion And Community Health Centers: Care Quality And Service Use Increased For Rural Patients." Health Affairs, vol. 37, no. 6, 2018, pp. 900-907. |
| Li, Qijuan, Trivedi, Amal N., Galarraga, Omar, Chernew, Michael E., Weiner, Daniel E., Mor, Vincent. "Medicare Advantage Ratings And Voluntary Disenrollment Among Patients With End-Stage Renal Disease." Health Affairs, vol. 37, no. 1, 2018, pp. 70-77. |
| Rivera-Hernández, Maricruz, Rahman, Momotazur, Galárraga, Omar. "Preventive healthcare-seeking behavior among poor older adults in Mexico: the impact of Seguro Popular, 2000-2012." Salud Pública de México, vol. 61, no. 1, ene-feb, 2018, pp. 46. |
| Maughan-Brown, Brendan, Smith, Philip, Kuo, Caroline, Harrison, Abigail, Lurie, Mark N., Bekker, Linda-Gail, Galárraga, Omar. "Readiness for Antiretroviral Therapy: Implications for Linking HIV-Infected Individuals to Care and Treatment." AIDS and Behavior, vol. 22, no. 3, 2018, pp. 691-700. |
| Williams DM, Lee HH, Connell L, Boyle H, Emerson J, Strohacker K, Galárraga O. "Small sustainable monetary incentives versus charitable donations to promote exercise: Rationale, design, and baseline data from a randomized pilot study." Contemporary Clinical Trials, vol. 66, 2018, pp. 80-85. |
| Maughan-Brown, Brendan, Kuo, Caroline, Galárraga, Omar, Smith, Philip, Lurie, Mark N., Bekker, Linda-Gail, Harrison, Abigail. "Stumbling Blocks at the Clinic: Experiences of Seeking HIV Treatment and Care in South Africa." AIDS and Behavior, vol. 22, no. 3, 2018, pp. 765-773. |
| Li, Xinqi C., Kusi, Lillian, Marak, Theodore, Bertrand, Thomas, Chan, Philip A., Galárraga, Omar. "The Cost and Cost-utility of Three Public Health HIV Case-finding Strategies: Evidence from Rhode Island, 2012–2014." AIDS and Behavior, vol. 22, no. 11, 2018, pp. 3726-3733. |
| Galárraga, Omar, Rana, Aadia, Rahman, Momotazur, Cohen, Mardge, Adimora, Adaora A., Sosanya, Oluwakemi, Holman, Susan, Kassaye, Seble, Milam, Joel, Cohen, Jennifer, Golub, Elizabeth T., Metsch, Lisa R., Kempf, Mirjam-Colette. "The effect of unstable housing on HIV treatment biomarkers: An instrumental variables approach." Social Science & Medicine, vol. 214, 2018, pp. 70-82. |
| Galárraga, Omar, Harries, Jane, Maughan-Brown, Brendan, Cooper, Diane, Short, Susan E, Lurie, Mark N, Harrison, Abigail. "The Empower Nudge lottery to increase dual protection use: a proof-of-concept randomised pilot trial in South Africa." Reproductive Health Matters, vol. 26, no. 52, 2018, pp. 1510701. |
| Sosa-Rubí, Sandra G., Salinas-Rodríguez, Aarón, Montoya-Rodríguez, Airain Alejandra, Galárraga, Omar. "The Relationship Between Psychological Temporal Perspective and HIV/STI Risk Behaviors Among Male Sex Workers in Mexico City." Archives of Sexual Behavior, vol. 47, no. 5, 2018, pp. 1551-1563. |
| Cole MB, Galárraga O, Wilson IB, Wright B, Trivedi AN. "At Federally Funded Health Centers, Medicaid Expansion Was Associated With Improved Quality Of Care." Health Affairs, vol. 36, no. 1, 2017, pp. 40-48. |
| Galárraga, Omar, Wamai, Richard G, Sosa-Rubí, Sandra G, Mugo, Mercy G, Contreras-Loya, David, Bautista-Arredondo, Sergio, Nyakundi, Helen, Wang’ombe, Joseph K. "HIV prevention costs and their predictors: evidence from the ORPHEA Project in Kenya." Health Policy and Planning, vol. 32, no. 10, 2017, pp. 1407-1416. |
| Haberer, Jessica E., Sabin, Lora, Amico, K. Rivet, Orrell, Catherine, Galárraga, Omar, Tsai, Alexander C., Vreeman, Rachel C., Wilson, Ira, Sam-Agudu, Nadia A., Blaschke, Terrence F., Vrijens, Bernard, Mellins, Claude A., Remien, Robert H., Weiser, Sheri D., Lowenthal, Elizabeth, Stirratt, Michael J., Sow, Papa Salif, Thomas, Bruce, Ford, Nathan, Mills, Edward, Lester, Richard, Nachega, Jean B., Bwana, Bosco Mwebesa, Ssewamala, Fred, Mbuagbaw, Lawrence, Munderi, Paula, Geng, Elvin, Bangsberg, David R. "Improving antiretroviral therapy adherence in resource-limited settings at scale: a discussion of interventions and recommendations." Journal of the International AIDS Society, vol. 20, no. 1, 2017. |
| Galárraga O, Sosa-Rubí SG, Kuo C, Gozalo P, González A, Saavedra B, Gras-Allain N, Conde-Glez CJ, Olamendi-Portugal M, Mayer KH, Operario D. "Punto Seguro: A Randomized Controlled Pilot Using Conditional Economic Incentives to Reduce Sexually Transmitted Infection Risks in Mexico." AIDS and Behavior, vol. 21, no. 12, 2017, pp. 3440-3456. |
| Embleton, Lonnie, Nyandat, Joram, Ayuku, David, Sang, Edwin, Kamanda, Allan, Ayaya, Samuel, Nyandiko, Winstone, Gisore, Peter, Vreeman, Rachel, Atwoli, Lukoye, Galarraga, Omar, Ott, Mary A., Braitstein, Paula. "Sexual Behavior Among Orphaned Adolescents in Western Kenya: A Comparison of Institutional- and Family-Based Care Settings." Journal of Adolescent Health, vol. 60, no. 4, 2017, pp. 417-424. |
| Galárraga, Omar, Gao, Burke, Gakinya, Benson N., Klein, Debra A., Wamai, Richard G., Sidle, John E., Papas, Rebecca K. "Task-shifting alcohol interventions for HIV+ persons in Kenya: a cost-benefit analysis." BMC Health Services Research, vol. 17, no. 1, 2017. |
| Youn, Bora, Shireman, Theresa I., Lee, Yoojin, Galárraga, Omar, Rana, Aadia I., Justice, Amy C., Wilson, Ira B. "Ten-year trends in anti-retroviral therapy persistence among US medicaid beneficiaries, 2001–2010." AIDS, 2017, pp. 1. |
| Were LPO, Were E, Wamai R, Hogan J, Galarraga O. "The Association of Health Insurance with institutional delivery and access to skilled birth attendants: evidence from the Kenya Demographic and health survey 2008-09." BMC Health Services Research, vol. 17, no. 1, 2017, pp. 454. |
| Shangani, Sylvia, Operario, Don, Genberg, Becky, Kirwa, Kipruto, Midoun, Miriam, Atwoli, Lukoye, Ayuku, David, Galárraga, Omar, Braitstein, Paula. "Unconditional government cash transfers in support of orphaned and vulnerable adolescents in western Kenya: Is there an association with psychological wellbeing?." PLOS ONE, vol. 12, no. 5, 2017, pp. e0178076. |
| Sullivan ME, Harrison A, Harries J, Sicwebu N, Rosen RK, Galárraga O. "Women's reproductive decision making and abortion experiences in Cape Town, South Africa: A qualitative study." Health Care for Women International, 2017, pp. 00-00. |
| Soipe AI, Razavi H, Razavi-Shearer D, Galárraga O, Taylor LE, Marshall BD. "Chronic hepatitis C virus (HCV) burden in Rhode Island: modelling treatment scale-up and elimination." Epidemiology and Infection, 2016, pp. 1-11. |
| Nachega JB, Adetokunboh O, Uthman OA, Knowlton AW, Altice FL, Schechter M, Galárraga O, Geng E, Peltzer K, Chang LW, Van Cutsem G, Jaffar SS, Ford N, Mellins CA, Remien RH, Mills EJ. "Community-Based Interventions to Improve and Sustain Antiretroviral Therapy Adherence, Retention in HIV Care and Clinical Outcomes in Low- and Middle-Income Countries for Achieving the UNAIDS 90-90-90 Targets." Current HIV/AIDS Reports, 2016. |
| Bautista-Arredondo S, Sosa-Rubí SG, Opuni M, Contreras-Loya D, Kwan A, Chaumont C, Chompolola A, Condo J, Galárraga O, Martinson N, Masiye F, Nsanzimana S, Ochoa-Moreno I, Wamai R, Wang'ombe J, ORPHEA study team. "Costs along the HTC and PMTCT service cascades: findings from Kenya, Rwanda, South Africa, and Zambia." AIDS, 2016. |
| Bautista-Arredondo, Sergio, Sosa-Rubí, Sandra G., Opuni, Marjorie, Contreras-Loya, David, Kwan, Ada, Chaumont, Claire, Chompolola, Abson, Condo, Jeanine, Galárraga, Omar, Martinson, Neil, Masiye, Felix, Nsanzimana, Sabin, Ochoa-Moreno, Ivan, Wamai, Richard, Wang’ombe, Joseph. "Costs along the service cascades for HIV testing and counselling and prevention of mother-to-child transmission." AIDS, vol. 30, no. 16, 2016, pp. 2495-2504. |
| Liu Y, Galárraga O. "Do national drug policies influence antiretroviral drug prices? Evidence from the Southern African Development community." Health Policy and Planning, 2016. |
| Zullo AR, Howe CJ, Galárraga O. "Estimating the Effect of Health Insurance on Personal Prescription Drug Importation." Medical Care Research and Review, vol. 74, no. 2, 2016, pp. 178-207. |
| Galárraga, Omar, Sosa-Rubí, Sandra G. "Male Sex Workers: HIV Risk and Behavioral Economics." The Oxford Handbook of the Economics of Prostitution, edited by Scott Cunningham and Manisha Shah, Oxford and New York, Oxford University Press, 2016. |
| Tiruneh, Yordanos M., Galárraga, Omar, Genberg, Becky, Wilson, Ira B. "Retention in Care among HIV-Infected Adults in Ethiopia, 2005– 2011: A Mixed-Methods Study." PLOS ONE, vol. 11, no. 6, 2016, pp. e0156619. |
| Rahman, M., Galarraga, O., Zinn, J. S., Grabowski, D. C., Mor, V. "The Impact of Certificate-of-Need Laws on Nursing Home and Home Health Care Expenditures." Medical Care Research and Review, vol. 73, no. 1, 2016, pp. 85-105. |
| Rivera-Hernandez, Maricruz, Rahman, Momotazur, Mor, Vincent, Galarraga, Omar. "The Impact of Social Health Insurance on Diabetes and Hypertension Process Indicators among Older Adults in Mexico." Health Services Research, vol. 51, no. 4, 2016, pp. 1323-1346. |
| Underhill K, Morrow KM, Colleran C, Holcomb R, Calabrese SK, Operario D, Galárraga O, Mayer KH. "A Qualitative Study of Medical Mistrust, Perceived Discrimination, and Risk Behavior Disclosure to Clinicians by U.S. Male Sex Workers and Other Men Who Have Sex with Men: Implications for Biomedical HIV Prevention." Journal of Urban Health, vol. 92, no. 4, 2015, pp. 667-686. |
| Wamai, R., Buzdugan, R., Galarraga, O., Chaumont, C., Sosa-Rubi, S., Bautista, S., Wang'ombe, J., Ochoa Moreno, I., Nyakundi, H., Mugo, M., Kwan, A., Sassi, A., Bollinger, G. "Assessing the efficiency of HIV prevention interventions in Kenya – the ORPHEA Project." Annals of Global Health, vol. 81, no. 1, 2015, pp. 58. |
| Zullo, Andrew R., Dore, David D., Galárraga, Omar. "Development and validation of an index to predict personal prescription drug importation by adults in the United States." Journal of Pharmaceutical Health Services Research, vol. 6, no. 1, 2015, pp. 33-41. |
| Strohacker K, Galárraga O, Emerson J, Fricchione SR, Lohse M, Williams DM. "Impact of Small Monetary Incentives on Exercise in University Students." Am J Hlth Behav, vol. 39, no. 6, 2015, pp. 779-86. |
| Sosa-Rubi, Sandra, Galarraga, Omar, Operario, Don, Saavedra, Biani, Mayer, Kenneth, Gras Allain, Nathalie, J Conde-Gonzalez, Carlos, Gonzalez, Andrea. "P005: Impact of conditional economic incentives to reduce risky behaviours among high-risk men who have sex with men in a three-year randomized pilot study." Journal of the International AIDS Society, vol. 18, no. 3 (Suppl 2), 2015. |
| Zullo AR, Caine K, Galárraga O. "The dollars and sense of economic incentives to modify HIV-related behaviours." Journal of the International AIDS Society, vol. 18, no. 1, 2015, pp. 1-3. |
| Rivera-Hernandez M, Galarraga O. "Type of Insurance and Use of Preventive Health Services Among Older Adults in Mexico." Journal of aging and health, vol. 27, no. 6, 2015, pp. 962-982. |
| Underhill K, Morrow KM, Colleran CM, Holcomb R, Operario D, Calabrese SK, Galárraga O, Mayer KH. "Access to Healthcare, HIV/STI Testing, and Preferred Pre-Exposure Prophylaxis Providers among Men Who Have Sex with Men and Men Who Engage in Street-Based Sex Work in the US." PLoS ONE, vol. 9, no. 11, 2014, pp. e112425. |
| Bautista-Arredondo S, Sosa-Rubí SG, Opuni M, Kwan A, Chaumont C, Coetzee J, Condo J, Dzekedzeke K, Galárraga O, Martinson N, Masiye F, Nsanzimana S, Wamai R, Wang'ombe J, ORPHEA study team. "Assessing cost and technical efficiency of HIV prevention interventions in sub-Saharan Africa: the ORPHEA study design and methods." BMC Health Services Research, vol. 14, 2014, pp. 599. |
| Galarraga, Omar, Sosa-Rubi, Sandra G., Conde-Glez, Carlos J., Juarez-Figueroa, Luis, Gonzalez, Andrea, Badial-Hernandez, Florentino, Bautista-Arredondo, Sergio, Kuo, Caroline, Operario, Don, Mayer, Kenneth H. "Economic Incentives to Reduce HIV Risks among Male Sex Workers: A Randomized Pilot in Mexico." AIDS Research and Human Retroviruses, vol. 30, no. S1, 2014, pp. A103-A104. |
| Rosen S, Larson B, Rohr J, Sanne I, Mongwenyana C, Brennan AT, Galárraga O. "Effect of antiretroviral therapy on patients' economic well being: five-year follow-up." AIDS, vol. 28, no. 3, 2014, pp. 417-24. |
| Kinnard EN, Taylor LE, Galárraga O, Marshall BD. "Estimating the true prevalence of hepatitis C in rhode island." Rhode Island medical journal (2013), vol. 97, no. 7, 2014, pp. 19-24. |
| Monteiro JF, Marshall BD, Escudero D, Sosa-Rubí SG, González A, Flanigan T, Operario D, Mayer KH, Lurie MN, Galárraga O. "Preventing HIV Transmission Among Partners of HIV-Positive Male Sex Workers in Mexico City: A Modeling Study." AIDS Behav, vol. 19, no. 9, 2014, pp. 1579-1588. |
| Galárraga, Omar, Sosa-Rubí, Sandra G, González, Andrea, Badial-Hernández, Florentino, Conde-Glez, Carlos J, Juárez-Figueroa, Luis, Bautista-Arredondo, Sergio, Kuo, Caroline, Operario, Don, Mayer, Kenneth H. "The disproportionate burden of HIV and STIs among male sex workers in Mexico City and the rationale for economic incentives to reduce risks." Journal of the International AIDS Society, vol. 17, no. 1, 2014. |
| Strohacker K, Galarraga O, Williams DM. "The impact of incentives on exercise behavior: a systematic review of randomized controlled trials." Annals of Behavioral Medicine, vol. 48, no. 1, 2014, pp. 92-9. |
| Galárraga O, Sosa-Rubí SG, Infante C, Gertler PJ, Bertozzi SM. "Willingness-to-accept reductions in HIV risks: conditional economic incentives in Mexico." Eur J Health Econ, vol. 15, no. 1, 2014, pp. 41-55. |
| Alarid-Escudero F, Sosa-Rubí SG, Fernández B, Galárraga O. "[Cost-benefit analysis: HIV/AIDS prevention in migrants in Central America]." Salud Pública de México, vol. 55 Suppl 1, 2013, pp. S23-30. |
| Operario, Don, Kuo, Caroline, Sosa-Rubí, Sandra G., Gálarraga, Omar. "Conditional economic incentives for reducing HIV risk behaviors: Integration of psychology and behavioral economics." Health Psychology, vol. 32, no. 9, 2013, pp. 932-40. |
| Galárraga O, Genberg BL, Martin RA, Barton Laws M, Wilson IB. "Conditional Economic Incentives to Improve HIV Treatment Adherence: Literature Review and Theoretical Considerations." AIDS and Behavior, vol. 17, no. 7, 2013, pp. 2283-92. |
| Galárraga O, Wirtz VJ, Santa-Ana-Tellez Y, Korenromp EL. "Financing HIV programming: how much should low- and middle-income countries and their donors pay?." PLoS ONE, vol. 8, no. 7, 2013, pp. e67565. |
| Fulton BD, Galárraga O, Dow WH. "Informing public policy toward binational health insurance: Empirical evidence from California." Salud Pública de México, vol. 55 Suppl 4, 2013, pp. s468-76. |
| Vitek, Wendy S., Galárraga, Omar, Klatsky, Peter C., Robins, Jared C., Carson, Sandra A., Blazar, Andrew S. "Management of the first in vitro fertilization cycle for unexplained infertility: a cost-effectiveness analysis of split in vitro fertilization-intracytoplasmic sperm injection." Fertility and Sterility, vol. 100, no. 5, 2013, pp. 1381-1388.e1. |
| Thirumurthy, H., Galarraga, O., Larson, B., Rosen, S. "HIV Treatment Produces Economic Returns Through Increased Work And Education, And Warrants Continued US Support." Health Affairs, vol. 31, no. 7, 2012, pp. 1470-1477. |
| Sosa-Rubí SG, Salinas-Rodríguez A, Galárraga O. "[Impact of "Seguro Popular" on catastrophic and out-of-pocket health expenditures in rural and urban Mexico, 2005-2008]." Salud Pública de México, vol. 53 Suppl 4, 2011, pp. 425-35. |
| Santa-Ana-Tellez, Yared, DeMaria, Lisa M., Galárraga, Omar. "Costs of interventions for AIDS orphans and vulnerable children." Tropical Medicine & International Health, vol. 16, no. 11, 2011, pp. 1417-1426. |
| Galárraga, Omar, Wirtz, Veronika J., Figueroa-Lara, Alejandro, Santa-Ana-Tellez, Yared, Coulibaly, Ibrahima, Viisainen, Kirsi, Medina-Lara, Antonieta, Korenromp, Eline L. "Unit Costs for Delivery of Antiretroviral Treatment and Prevention of Mother-to-Child Transmission of HIV." PharmacoEconomics, 2011, pp. 1. |
| Rosales-Martínez Y, Nigenda G, Galárraga O, Ruiz-Larios JA. "[Migration expectations among nursing students in Mexico City]." Salud Pública de México, vol. 52, no. 3, 2010, pp. 244-53. |
| Galárraga O, Salkever DS, Cook JA, Gange SJ. "An instrumental variables evaluation of the effect of antidepressant use on employment among HIV-infected women using antiretroviral therapy in the United States: 1996-2004." Health economics, vol. 19, no. 2, 2010, pp. 173-88. |
| Rosales-Martínez, Yetzi, Nigenda, Gustavo, Galárraga, Omar, Ruiz-Larios, José Arturo. "Expectativas de migración internacional en estudiantes de enfermería en México, Distrito Federal." Salud Pública de México, vol. 52, no. 3, 2010, pp. 244-253. |
| Demaria LM, Galárraga O, Campero L, Walker DM. "[Sex education and HIV prevention: an evaluation in Latin America and the Caribbean]." Revista Panamericana de Salud Pública, vol. 26, no. 6, 2009, pp. 485-93. |
| Sosa-Rubí SG, Galárraga O, López-Ridaura R. "Diabetes treatment and control: the effect of public health insurance for the poor in Mexico." Bulletin of the World Health Organization, vol. 87, no. 7, 2009, pp. 512-9. |
| DeMaria, Lisa M., Galárraga, Omar, Campero, Lourdes, Walker, Dilys M. "Educación sobre sexualidad y prevención del VIH: un diagnóstico para América Latina y el Caribe." Revista Panamericana de Salud Pública, vol. 26, no. 6, 2009. |
| Galárraga, Omar, Sosa-Rubí, Sandra G., Salinas-Rodríguez, Aarón, Sesma-Vázquez, Sergio. "Health insurance for the poor: impact on catastrophic and out-of-pocket health expenditures in Mexico." Eur J Health Econ, vol. 11, no. 5, 2009, pp. 437-447. |
| Sosa-Rubí SG, Galárraga O, Harris JE. "Heterogeneous impact of the "Seguro Popular" program on the utilization of obstetrical services in Mexico, 2001-2006: a multinomial probit model with a discrete endogenous variable." Journal of health economics, vol. 28, no. 1, 2009, pp. 20-34. |
| Galárraga O, Colchero MA, Wamai RG, Bertozzi SM. "HIV prevention cost-effectiveness: a systematic review." BMC Public Health, vol. 9 Suppl 1, 2009, pp. S5. |
| Galarraga, Omar; Salkever, David S. Antidepressants and Labor Market Outcomes of Persons Living with HIV: An Analysis of Users of Highly-Active Antiretroviral Therapy in the United States: 1996-2004. VDM Verlag, 2008. |
| Galárraga, Omar; Campero, Lourdes; DeMaria, Lisa M.; Walker, Dilys. Sexuality education for HIV prevention in Latin America and the Caribbean: a regional diagnosis / Educación sexual para la prevención del VIH en Latinoamérica y el Caribe: Diagnóstico regional. Instituto de Salud Pública de México, 2008. |
| Galárraga O, Bertozzi SM. "Stakeholders' opinions and expectations of the Global Fund and their potential economic implications." AIDS, vol. 22 Suppl 1, 2008, pp. S7-S15. |
| Galárraga O, O'Brien ME, Gutiérrez JP, Renaud-Théry F, Nguimfack BD, Beusenberg M, Waldman K, Soni A, Bertozzi SM, Greener R. "Forecast of demand for antiretroviral drugs in low and middle-income countries: 2007-2008." AIDS, vol. 21 Suppl 4, 2007, pp. S97-103. |
| Befekadu Degefe, Alemayehu Seyoum, Abebe Shemelis, Ben Linkow, Omar Galárraga, Geoffrey Mwau, Derrese Degefa, Shu-Shu Teklehaimanot, Shewaye Woldeyes, Azeb Woldemariam. "Human assets for Africa’s development." Economic Report on Africa 2000: Transforming Africa's Economies, edited by Ali Abdel Gadir Ali, Patrick K. Asea, Addis Ababa, Ethiopia, United Nations Economic Commission for Africa, 2001, pp. 96. |
A large portion of Dr. Galárraga's research uses field experiments such as randomized controlled trials to test the effects of conditional (and unconditional) economic incentives for health behavior change, including incentives to exercise as well as incentives to improve HIV prevention and treatment outcomes. A related area of research concerns computer-based survey experiments (including discrete choice experiments and contigent valuation methods) to inform program / intervention design and analyze participants' preferences. Another area of his research uses quasi-experimental and rigorous non-experimental approaches (including instrumental variables, differences-in-differences, regression discontinuity) to analyze the impact of health systems reform and insurance expansion. His research on health systems reform has led to publications evaluating the impact of social health insurance programs (such as Seguro Popular in Mexico, the National Hospital Insurance Fund in Kenya, and Medicaid in the US) on various economic and health outcomes. Other papers have concerned modelling evaluations as well as economic efficiency research (such as microsimulation, cost-effectiveness, cost-benefit and cost-utility studies).
* Experimental approaches with economic-based interventions for health behavior change
Dr. Galárraga analyzes the effects of microfinance, and conditional economic incentives for behavior change among vulnerable populations. He explores the effectiveness of behavioral economic innovations to prevent and treat HIV and chronic conditions in Kenya, Mexico, South Africa, Ghana and the US. This work is funded by NIH (Fogarty International Center, NIMH, NCI, NIAID, and NICHD).
* Survey experiment (discrete choice experiments and contingent valuation) methods to inform program/intervention design and participants' preferences.
* Use of rigorous quasi-experimental approaches to evaluate causal effects of health systems innovations and impact of health interventions and policies.
Dr. Galárraga investigates the effects of health systems' reform and policies on various outcomes including obstetric care, vertical HIV transmission, diabetes treatment and control, and catastrophic & out-of-pocket health expenditures. Health systems reform and policies is an important topic of research in Mexico, the US and other countries because of the need to expand treatment and prevention services, improve quality, and contain costs. He uses rigorous quasi-experimental approaches (instrumental variables, differences-in-differences, regression discontinuity, matching, etc.) to evaluating health systems reform, particularly health financing initiatives. Funded by NIH, the Hewlett Foundation, and federal/local government sources, he has worked in various countries including Ecuador, Mexico, Kenya, Ghana and the US:
Galárraga O, Quijano-Ruiz A, Faytong-Haro A. The effects of mobile primary health teams: Evidence from the Médico del Barrio strategy in Ecuador. World Development. 2024 181: 106659,
ISSN 0305-750X, https://doi.org/10.1016/j.worlddev.2024.106659.
Thapa BB, Laws MB, Galárraga O. Evaluating the impact of integrated behavioral health intervention: Evidence from Rhode Island. Medicine (Baltimore). 2021 Aug 27;100(34):e27066.
Galárraga O, Harris JE. Effect of an abrupt change in sexual and reproductive health policy on teen birth rates in Ecuador, 2008-2017. Econ Hum Biol. 2021 May;41:100967.
Velasco MC, Chrysanthopoulou SA, Galárraga O. Cash Transfers and Contraceptive Use: A Regression Discontinuity Analysis. Stud Fam Plann. 2020 Dec;51(4):309-321.
Galárraga O, Rana A, Rahman M, Cohen M, Adimora AA, Sosanya O, Holman S, Kassaye S, Milam J, Cohen J, Golub ET, Metsch LR, Kempf MC. The effect of unstable housing on HIV treatment biomarkers: An instrumental variables approach. Soc Sci Med. 2018 Oct;214:70-82.
* Economic Evaluation and Economic Efficiency of Health Programs
Another area of Dr, Galárraga's research is his work on costs, cost-effectiveness, and cost-benefit analyses using primary data collection as well as modeling / microsimulation. This work has been conducted with financing from several sources including NIH; World Health Organization; UNAIDS; the Global Fund to Fight AIDS, Malaria and Tuberculosis; and the Bill & Melinda Gates Foundation.
Sawe SJ, Mugo R, Wilson-Barthes M, Osetinsky B, Chrysanthopoulou SA, Yego F, Mwangi A, Galárraga O. Gaussian process emulation to improve efficiency of computationally intensive multidisease models: a practical tutorial with adaptable R code. BMC Med Res Methodol. 2024 Jan 27;24(1):26. doi: 10.1186/s12874-024-02149-x.
Wilson-Barthes M, Braitstein P, DeLong A, Ayuku D, Atwoli L, Sang E, Galárraga O. Cost Utility of Supporting Family-Based Care to Prevent HIV and Deaths among Orphaned and Separated Children in East Africa: A Markov Model-Based Simulation. MDM Policy Pract. 2022 Dec 22;7(2):23814683221143782.
Wilson-Barthes M, Chrysanthopoulou SA, Atwoli L, Ayuku D, Braitstein P, Galárraga O. Cost-Effectiveness of Care Environments for Improving the Mental Health of Orphaned and Separated Children and Adolescents in Kenya. J Ment Health Policy Econ. 2021 Jun 1;24(2):31-41.
Goedel WC, Chan PA, King MRF, Prosperi MCF, Marshall BDL, Galárraga O. Cost-Effectiveness of a Statewide Pre-Exposure Prophylaxis Program for Gay, Bisexual, and Other Men Who Have Sex with Men. R I Med J (2013). 2019 Nov 1;102(9):36-39.
Osetinsky B, Mwangi A, Pastakia S, Wilson-Barthes M, Kimetto J, Rono K, Laktabai J, Galárraga O. Layering and scaling up chronic non-communicable disease care on existing HIV care systems and acute care settings in Kenya: a cost and budget impact analysis. J Int AIDS Soc. 2020 Jun;23 Suppl 1(Suppl 1):e25496.
RESEARCH GRANTS AND CONTRACTS : ACTIVE
1. Empirical testing of a widely available insurance-based monetary incentive program for exercise: A randomized trial
Role: Multiple Principal Investigator
Agency: NIH (National Cancer Institute: R01CA262894)
Period: 7/15/2021 – 6/30/2026 Amount: $2.5M
[direct costs]
2. Impact of Prescription Caps on Health Outcomes in People Infected with HIV
Role: Multiple Principal Investigator
Agency: NIH (National Institute of Mental Health: R01MH122301)
Period: 8/01/2020 – 5/31/2025 Amount: $2.5M
[direct costs]
3. HARAMBEE: Integrated Community-Based HIV/NCD Care & Microfinance Groups in Kenya
Role: Multiple Principal Investigator
Agency: NIH (National Institute of Mental Health: R01MH118075)
Period: 7/5/2019 – 4/30/2025 Amount: $2.5M
[direct costs]
RESEARCH GRANTS AND CONTRACTS : COMPLETED [selected]
4. PrEP Seguro: Antiretrovial-based HIV prevention among men at high risk in Mexico
Role: Principal Investigator
Agency: NIH (National Institute of Mental Health: R34MH114664)
Period: 7/1/2018 – 6/30/2022 Amount: $618,700
5. Kenya Training for Integrated Modeling Epidemiologic & Economic Long-Term Outcomes in Africa (inMODELA)
Role: Principal Investigator
Agency: NIH (Fogarty International Center)/ PEPFAR
Period: 6/1/2021 – 5/30/2022 Amount: $100,000
6. Orphaned & Separated Children’s Assessment Related to their Health & Well-Being
Role: Co-Investigator (Cost Effectiveness); PI: Paula Braitstein, University of Toronto
Agency: NIH/NICHD (R01HD11968977)
Period: 9/15/2015 – 05/31/2021 Amount: $2.5M
7. The Impact of Social Distancing on health care utilization and outcomes at Neighborhood Health Plan of RI
Role: Co-Investigator; PI: Ira Wilson, Brown Univ.
Agency: Brown COVID-19 Research Seed Award
Period: 04/30/2020-05/15/2021 Amount: $16,000
8. Evaluation of the Integrated Behavioral Health Initiative (IBH) and the Community Health Teams (CHT) in Rhode Island using All-Payers Claims Dataset (APCD)
Role: Principal Investigator
Agency: Care Transformation Collaborative (CTC)
Period 07/01/2016 – 06/30/2020 Amount: $415,435
9. Evaluating HIV pre-exposure prophylaxis implementation using APCD
Role: Multiple Principal Investigator
Agency: NIH (National Institute of Mental Health: R21MH113431)
Period: 4/1/2017 – 3/30/2020 Amount: $425,686
10. Integrated Modeling Epidemiologic & Economic Long-Term Outcomes in Africa (inMODELA)
Role: Principal Investigator
Agency: NIH (Fogarty International Center)/ PEPFAR
Period: 4/1/2017 – 9/30/2019 Amount: $426,250
11. Conditional Economic Incentives for Improving Adolescent Adherence to HIV Treatment
Role: Multiple Principal Investigator
Agency: NIH/NIAID (R21AI118393)
Period 08/01/2016 – 6/30/2019 Amount: $446,875
12. Effect of Unstable Housing on HIV Treatment Biomakers
Role: Subcontract PI
Agency: NIH/NIMHD (R01 UAB-MISS WIHS Cohort)
Period: 7/01/2017 – 12/31/2018 Amount: $23,699
13. Using Behavioral Economics to Promote Exercise among Inactive Adults
Role: Multiple Principal Investigator
Agency: NIH/NCI (R03CA188473)
Period 08/01/2015 – 6/30/2018 Amount: $162,500
14. Empower, Nudge: Increasing Dual Protection among Young Women in South Africa
Role: Multiple Principal Investigator
Agency: Brown University Competitive Research Seed Funds
Period 01/01/2015 – 12/31/2016 Amount: $80,000
15. Economic Modeling to Inform HIV Testing and Prevention in Rhode Island
Role: Principal Investigator
Agency: Centers for Disease Control and Prevention/Rhode Island Dept. of Health
Period: 02/01/2015 – 01/31/2016 Amount: $24,000
16. The Impact of Social Health Insurance on HIV Treatment and Prevention in western Kenya
Role: Principal Investigator
Agency: Center for AIDS Research
Period 01/01/2014 – 12/31/2015 Amount: $40,000
17. Conditional Economic Incentives to Reduce HIV Risk: A Pilot in Mexico
Role: Principal Investigator
Agency: NIH/NICHD (5R21HD065525)
Period 01/01/2011 – 12/31/2013 Amount: $426,213
18. Conditional Cash Transfers to Prevent Sexually Transmitted Infections in Mexico
Role: Principal Investigator
Agency: NIH/FIC (5K01TW008016)
Period 02/01/2008 – 7/31/2012 Amount: $347,723
19. Global Fund Financing Scenarios & Costs of Antiretroviral Therapy in Low- and Middle-Income Countries
Role: Principal Investigator
Agency: Bill and Melinda Gates Foundation
Period: 9/15/2008 – 08/31/2009 Amount: $80,352
20. Costs of Antiretroviral Therapy in Low- and Middle-Income Countries: Systematic Review
Role: Principal Investigator
Agency: Global Fund to Fight AIDS, Tuberculosis and Malaria
Period: 9/30/2009 – 8/31/2010 Amount: $28,851
21. Binational Health Insurance: U.S. and Mexico
Role: Principal Investigator (co-PI: Will H. Dow, UC Berkeley)
Agency: UC MEXUS
Period: 09/29/2008 – 04/30/2009 Amount: $26,933
22. Forecasting active pharmaceutical ingredient amounts for HIV treatments
Role: Co-Principal Investigator (co-PI: Stefano M. Bertozzi, INSP / UC Berkeley)
Agency: United Nations Joint Program on HIV/AIDS (UNAIDS)
Period: 09/01/2006 – 08/31/2008 Amount: $29,604
23. Analysis of the 360° Stakeholder Survey
Role: Co-Principal Investigator (co-PI: Stefano M. Bertozzi, INSP / UC Berkeley)
Agency: Global Fund to Fight AIDS, Tuberculosis and Malaria
Period: 7/15/2006 – 1/31/2007 Amount: $21,867
Working Papers:
Galárraga O, Gertler PJ. 2009. "Conditional Cash and Adolescent Risk Behaviors: Evidence from Mexico" Working Paper presented at the Allied Social Science Association (ASSA) / American Economic Association (AEA) January 2010 meetings.
Galárraga O, Sosa-Rubí SG, Salinas A, and Sesma, S. 2010. "Health Insurance for the Poor: Impact on Catastrophic and Out-of-pocket Health Expenditures in Mexico." European Journal of Health Economics 11(5):437-447. [Earlier version as Health Econometrics and Data Group/University of York, UK, Working Paper 08/12]
Galárraga O, Salkever DS, Cook JA, Gange SJ. 2010. "An Instrumental Variables Evaluation of Antidepressant Use on Employment among HIV-infected Women using Highly Active Antiretroviral Therapy in the United States:1996 to 2004." Health Economics 19(2): 173-188. [Earlier version as National Bureau of Economic Research, NBER Working Paper w12619]
Sosa-Rubí SG, Galárraga O, Harris JE. 2009. "Heterogeneous Impact of the Seguro Popular Program on the Utilization of Obstetrical Services in Mexico, 2001-2006: A Multinomial Probit Model with a Discrete Endogenous Variable." Journal of Health Economics 28(1):20-34. [Earlier version as National Bureau of Economic Research, NBER Working Paper w13498]
Galárraga O, Harris JE. Effect of an abrupt change in sexual and reproductive health policy on teen birth rates in Ecuador, 2008-2017. Economics and Human Biology. 2021 May;41:100967. doi: 10.1016/j.ehb.2020.100967. Epub 2020 Dec 25. PMID: 33388633; PMCID: PMC8068587. [Earlier version as National Bureau of Economic Research, NBER Working Paper w26044]
Esseau-Thomas C, Galarraga O, Khalifa S. Epidemics, pandemics and income inequality. Health Economics Review. 2022 Jan 18;12(1):7. doi: 10.1186/s13561-022-00355-1. PMID: 35043257; PMCID: PMC8765494. [Earlier version as Health Econometrics and Data Group/University of York, UK, Working Paper 20/22]
Galarraga O, Quijano-Ruiz A, Faytong-Haro M. 2022. The Effects of Mobile Primary Health Teams: Evidence from the Médico de Barrio Strategy in Ecuador. Working Paper presented at the Allied Social Science Association (ASSA) / American Economic Association (AEA) January 2023 meetings.
| Year | Degree | Institution |
|---|---|---|
| 2007 | PhD | The Johns Hopkins University |
* BA summa cum laude, University of DC, 1994
* National Competitive Exam (NCE) Professional, United Nations, 1998
* Fellowship, Johns Hopkins University, 2001
* Health Economics Fellowship, NIH / NIMH, 2003
* Phi Beta Kappa, Johns Hopkins University, 2006
* International Researcher Scientist Development Award (IRSDA), NIH, 2008
* MA ad eundem, Brown University, 2018
| Name | Title |
|---|---|
| Dore, David | Adjunct Assistant Professor of Health Services, Policy and Practice |
| Genberg, Becky | Adjunct Assistant Professor of Health Services, Policy and Practice |
| Harrison, Abigail | Associate Professor of Behavioral and Social Sciences (Research) |
| Hogan, Joseph | Carole and Lawrence Sirovich Professor of Public Health, Professor of Biostatistics, Chair of Biostatistics |
| Howe, Chanelle | Associate Professor of Epidemiology |
| Kuo, Caroline | Adjunct Associate Professor of Behavioral and Social Sciences |
| Kwara, Awewura | Associate Professor of Medicine |
| Laws, M. Barton | Associate Professor of Health Services, Policy and Practice |
| Lurie, Mark | Professor of Epidemiology |
| Marshall, Brandon | Professor of Epidemiology |
| Mayer, Kenneth | Adjunct Professor of Medicine, Adjunct Professor of Epidemiology |
| McGarvey, Stephen | Professor of Epidemiology |
| Mor, Vincent | Florence Pirce Grant University Professor of Health Services, Policy and Practice, Professor of Health Services, Policy and Practice |
| Operario, Don | Adjunct Professor of Behavioral and Social Sciences |
| Rahman, Md | Associate Professor of Health Services, Policy and Practice |
| Rivera-Hernandez, Maricruz | Associate Professor of Health Services, Policy and Practice |
| Shireman, Theresa | Director of the Center for Gerontology and Health Care Research, Professor of Health Services, Policy and Practice, Professor of Epidemiology |
| Short, Susan | Robert E. Turner Distinguished Professor of Population Studies |
| Taylor, Lynn | Associate Professor of Medicine, Clinician Educator |
| Trivedi, Amal | Professor of Health Services, Policy and Practice, Professor of Medicine |
| Williams, David | Professor of Behavioral and Social Sciences, Professor of Psychiatry and Human Behavior, Associate Dean of School of Public Health |
| Wilson, Ira | Associate Provost for Academic Space, Professor of Health Services, Policy and Practice, Professor of Medicine |
| Zullo, Andrew | Associate Professor of Epidemiology, Associate Professor of Health Services, Policy and Practice |
At Brown:
* International Health Institute (IHI)
* Center for Gerontology and Health Care Research
* Population Studies and Training Center (PSTC)
* Providence / Boston Center for AIDS Research (CFAR)
* Watson Institute Africa Initiative
National and International Research Groups:
* Academy Health
* American Economic Association (AEA)
* American Society for Health Economists (ASHEcon)
* International Health Economics Association (iHEA)
* International HIV/AIDS Economics Network (IAEN)
PHP1100 Comparative Health Systems
Focuses on principles of national health system organization and cross-national comparative analysis. Emphasizes application of comparative models to the analysis of health and health-related systems among nations at varying levels of economic development and health care reform with particular emphasis on low- and middle-income countries. Addresses research questions related to population health and systems' performance. Case study for Fall 2020: Successful Covid-19 responses from health systems around the world.
PHP 2480 Selected Topics in Health Economics
Advanced seminar on theory and practice of health economics at the global level. Analyzes current research papers on econometric methods in the global health setting including: field experiments, instrumental variables, propensity score matching/weigthing, synthetic controls, causal machine learning, and regression discontinuity. Reviews current global health economics topics: economic incentives for providers and consumers, social health insurance, public goods and externalities.
PHP2430 Analysis of Population-Based Datasets
Epidemiologic, health services, and social research often conducts "secondary analysis" of existing population-based datasets. Benefits include their representative sampling frames allowing generalizability to larger populations, timeliness, and lower cost. In addition, computer technology makes it possible to link some databases providing richer sources of information. There are several technical and methodological concerns when conducting "secondary analysis." Students will download, link, and analyze several data sets to understand the advantages of these data for health policy analysis as well as understand and apply different analytic methods.
Student supervision
Dr. Galárraga usually supervises students with an interest in health systems research in low- and middle-income countries, strong quantitative skills and a background in economics and public health. He supervises several undergraduate, Master's, doctoral and post-doctoral students every year. For current projects and potential data please see: https://sites.brown.edu/galarragaresearchlab/
| PHP 1100 - Comparative Health Care Systems |
| PHP 1480 - Introduction To Public Health Economics |
| PHP 2430 - Analysis of Population Based Datasets |
| PHP 2480 - Selected Topics in Global Health Economics |
| PHP 2480 - Selected Topics in Health Economics |
| PHP 2950 - Doctoral Seminar in Public Health |
