• 2007 – Doctorate in Health Economics, Johns Hopkins University.
  • 2004 – Master in Health Economics, Johns Hopkins University.
  • 1996 – Master in Development Economics, American University.
  • 1994 – Economics, University of the District of Columbia.

Academic appointments:

  • Research professor at the Brown University School of Public Health in Providencia, RI, USA since 2010.
  • Visiting Professor at the Center for Population and Development Studies at Harvard University in Cambridge, MA, USA in 2016.
  • Researcher affiliated with CISIDAT.

Research interests:

  • Empirical analysis of the impact of public health interventions, particularly HIV prevention and treatment, using econometric techniques such as difference in differences, discontinuous regression, instrumental variables, propensity scores, etc.
  • The most interesting topics focus on using conditioned economic incentives for behavior change, evaluation of health insurance systems, and cost-effectiveness applications.

Featured projects:

  • He previously held academic appointments at the University of California, Berkeley, and the Institute of Public Health in Cuernavaca, Mexico (2006-2010).
  • He has been Associate Officer for Economic Affairs for the United Nations Commission for Africa (UNECA) in Addis Ababa, Ethiopia (1999-2001);
  • Research Analyst for Mathematica Policy Research, Inc. (1998-1999); Manager of the Economic Analysis Program for the Micronutrient Interventions Project (OMNI) for USAID (1996-1998) and consultant for various international organizations such as UNAIDS, the World Bank, the World Health Organization, and the Global Fund for the fight against AIDS, Tuberculosis, and Malaria.


  • Hypertension Control and Retention in Care Among HIV-Infected Patients: The Effects of Co-located HIV and Chronic Noncommunicable Disease Care. Osetinsky B, Genberg BL, Bloomfield GS, Hogan J, Pastakia S, Sang E, Ngressa A, Mwangi A, Lurie MN, McGarvey ST, Galárraga O. J Acquir Immune Defic Syndr. 2019 Dec 1;82(4):399-406.
  • “I Do Try To Use Condoms, But…”: Knowledge and Interest in PrEP Among Male Sex Workers in Mexico City. Edeza A, Galárraga O, Santamaria EK, Sosa-Rubí S, Operario D, Biello KB. Arch Sex Behav. 2019 Oct 7.
  • Potential Impact of Interventions to Enhance Retention in Care During Real-World HIV Pre-Exposure Prophylaxis Implementation. Chan PA, Goedel WC, Nunn AS, Sowemimo-Coker G, Galárraga O, Prosperi M, Patel R, Mena L, Montgomery MC, Marshall BDL. AIDS Patient Care STDS. 2019 Oct;33(10):434-439.
  • Conditional economic incentives to improve HIV prevention and treatment in low-income and middle-income countries. Galárraga O, Sosa-Rubí SG. Lancet HIV. 2019 Oct;6(10):e705-e714.
  • The Impact of Rhode Island’s Multipayer Patient-centered Medical Home Program on Utilization and Cost of Care. Cole MB, Galárraga O, Wilson IB. Med Care. 2019 Oct;57(10):801-808.
  • Trends in medication adherence in HIV patients in the US, 2001 to 2012: an observational cohort study. Youn B, Shireman TI, Lee Y, Galárraga O, Wilson IB. J Int AIDS Soc. 2019 Aug;22(8):e25382.
  • Epidemiological And Health Systems Implications Of Evolving HIV And Hypertension In South Africa And Kenya. Osetinsky B, Hontelez JAC, Lurie MN, McGarvey ST, Bloomfield GS, Pastakia SD, Wamai R, Bärnighausen T, de Vlas SJ, Galárraga O. Health Aff (Millwood). 2019 Jul;38(7):1173-1181.
  • The Impact of Medicaid Expansion on Continuous Enrollment: a Two-State Analysis. Gordon SH, Sommers BD, Wilson I, Galarraga O, Trivedi AN. J Gen Intern Med. 2019 Sep;34(9):1919-1924.
  • Trends in Comorbid Conditions Among Medicaid Enrollees With HIV. Cole MB, Galárraga O, Rahman M, Wilson IB. Open Forum Infect Dis. 2019 Mar 10;6(4):ofz124.
  • In-Clinic Adolescent Peer Group Support for Engagement in Sub-Saharan Africa: A Feasibility and Acceptability Trial. Barker D, Enimil A, Galárraga O, Bosomtwe D, Mensah N, Thamotharan S, Henebeng E, Brown L, Kwara A. J Int Assoc Provid AIDS Care. 2019 Jan-Dec.