Owen Ozier
is an economist in the Development Research Group, Human Development Team.  He received his M.Eng. and B.S. degrees in Electrical Engineering and Computer Science and in Brain and Cognitive Sciences from the Massachusetts Institute of Technology in 1999, and his Ph.D. in Economics from the University of California at Berkeley in 2010.  His current research projects focus on health, education, and economic decisions in Sub-Saharan Africa.


The Impact of Violence on Individual Risk Preferences: Evidence from a Natural Experiment
Review of Economics and Statistics, accepted April 2018
Joint with Pamela Jakiela
(Circulated as IZA Discussion Paper 9870, 2016. Earlier version: Policy Research Working Paper 7440, 2015; also available at SSRN, and as Households in Conflict Network working paper 204.)
- March 2018 Podcast: 20-minute interview on Four Questions by Alice Evans

Exploiting Externalities to Estimate the Long-term Effects of Early Childhood Deworming
American Economic Journal: Applied Economics, 2018, 10(3): 235-262
(Earlier version appears as World Bank WPS 7052; also available from SSRN.)
- Featured in May 2017 World Bank Research e-Newsletter: "Deworming in early childhood can benefit younger siblings and the community"
- January 2017 ASSA presentation
- September 2015 World Bank Evidence to Policy note:"KENYA: Do Infants Benefit When Older Siblings are Dewormed?" (also available in French)
- August 2015 VOX article: Mass deworming: (Still) a best buy for international development
- July 2015 Center for Global Development blog post discussion: Mapping the Worm Wars: What the Public Should Take Away from the Scientific Debate about Mass Deworming
- Featured in World Bank DECRG November 2014 Research Highlights
Abstract: I estimate the impacts of secondary school on human capital, occupational choice, and fertility for young adults in Kenya. Probability of admission to government secondary school rises sharply at a score close to the national mean on a standardized 8th grade examination, permitting me to estimate causal effects of schooling in a regression discontinuity framework. I combine administrative test score data with a recent survey of young adults to estimate these impacts. My results show that secondary schooling increases human capital, as measured by performance on cognitive tests included in the survey. For men, I find a drop in the probability of low-skill self-employment, as well as suggestive evidence of a rise in the probability of formal employment. The opportunity to attend secondary school also reduces teen pregnancy among women.
- Featured in World Bank Development Research Human Development Quarterly Update 2015 Q3
- Blog coverage by David Evans on Development Impact: Regression Discontinuity Porn 

Commentary. Fixed effects and risks of miscommunication: a comment on Jullien, Sinclair and Garner
International Journal of Epidemiology
(2016) 45 (6): 2156-2158
Coverage in the Daily Nation (Kenya) 

Does Africa Need a Rotten Kin Theorem?  Experimental Evidence from Village Economies
Review of Economic Studies
(2016) 83 (1): 231-268
Joint with Pamela Jakiela
Earlier version appears as World Bank WPS 6085; also available from SSRN.)

Abstract:  This paper measures the economic impacts of social pressures to share income with kin and neighbors in rural Kenyan villages. We conduct a lab experiment in which we randomly vary the observability of investment returns to test whether subjects reduce their income in order to keep it hidden. We find that women adopt an investment strategy that conceals the size of their initial endowment in the experiment, though that strategy reduces their expected earnings. This effect is largest among women with relatives attending the experiment. Parameter estimates suggest that women anticipate that observable income will be "taxed" at a rate above four percent; this effective tax rate nearly doubles when kin can observe income directly. At the village level, we find a robust association between willingness to forgo expected return to keep income hidden in the laboratory experiment, and worse economic outcomes outside the laboratory. Though this paper provides experimental evidence from a single African country - Kenya - observational studies suggest that similar kin pressures may be prevalent in many parts of the developing world.
- Featured in World Bank September 2012 Research e-Newsletter

Monitoring and evaluating the impact of national school-based deworming in Kenya: study design and baseline results
Parasites and Vectors
(July 2013) 6:198
Joint with CS Mwandawiro, B Nikolay, JH Kihara, DA Mukoko, MT Mwanje, A Hakobyan, RL Pullan, SJ Brooker, SM Njenga
Abstract:  An increasing number of countries in Africa and elsewhere are developing national plans for the control of neglected tropical diseases. A key component of such plans is school-based deworming (SBD) for the control of soil-transmitted helminths (STHs) and schistosomiasis. Monitoring and evaluation (M&E) of national programmes is essential to ensure they are achieving their stated aims and to evaluate when to reduce the frequency of treatment or when to halt it altogether. The article describes the M&E design of the Kenya national SBD programme and presents results from the baseline survey conducted in early 2012.