Joan Hamory Hicks

CEGA, Center for Effective Global Action
207 Giannini Hall, Univ of CA, Berkeley
Berkeley, CA 94720-3310

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NBER Working Papers and Publications

March 2017Reevaluating Agricultural Productivity Gaps with Longitudinal Microdata
with Marieke Kleemans, Nicholas Y. Li, Edward Miguel: w23253
Recent research has pointed to large gaps in labor productivity between the agricultural and nonagricultural sectors in low-income countries, as well as between workers in rural and urban areas. Most estimates are based on national accounts or repeated cross-sections of micro-survey data, and as a result typically struggle to account for individual selection between sectors. This paper uses long-run individual-level panel data from two low-income countries (Indonesia and Kenya). Accounting for individual fixed effects leads to much smaller estimated productivity gains from moving into the nonagricultural sector (or urban areas), reducing estimated gaps by over 80%. Per capita consumption gaps are also small once individual fixed effects are included. Estimated productivity gaps do not emer...
July 2016Does Mass Deworming Affect Child Nutrition? Meta-analysis, Cost-Effectiveness, and Statistical Power
with Kevin Croke, Eric Hsu, Michael Kremer, Edward Miguel: w22382
The WHO has recently debated whether to reaffirm its long-standing recommendation of mass drug administration (MDA) in areas with more than 20% prevalence of soil-transmitted helminths (hookworm, whipworm, and roundworm). There is consensus that the relevant deworming drugs are safe and effective, so the key question facing policymakers is whether the expected benefits of MDA exceed the roughly $0.30 per treatment cost. The literature on long run educational and economic impacts of deworming suggests that this is the case. However, a recent meta-analysis by Taylor-Robinson et al. (2015) (hereafter TMSDG), disputes these findings. The authors conclude that while treatment of children known to be infected increases weight by 0.75 kg (95% CI: 0.24, 1.26; p=0.0038), there is substantial eviden...
July 2015Worms at Work: Long-run Impacts of a Child Health Investment
with Sarah Baird, Michael Kremer, Edward Miguel: w21428
This study estimates long-run impacts of a child health investment, exploiting community-wide experimental variation in school-based deworming. The program increased labor supply among men and education among women, with accompanying shifts in labor market specialization. Ten years after deworming treatment, men who were eligible as boys stay enrolled for more years of primary school, work 17% more hours each week, spend more time in non-agricultural self-employment, are more likely to hold manufacturing jobs, and miss one fewer meal per week. Women who were in treatment schools as girls are approximately one quarter more likely to have attended secondary school, halving the gender gap. They reallocate time from traditional agriculture into cash crops and non-agricultural self-employment. ...

Published: Sarah Baird & Joan Hamory Hicks & Michael Kremer & Edward Miguel, 2016. "Worms at Work: Long-run Impacts of a Child Health Investment," The Quarterly Journal of Economics, vol 131(4), pages 1637-1680.

May 2015When Should Governments Subsidize Health? The Case of Mass Deworming
with Amrita Ahuja, Sarah Baird, Michael Kremer, Edward Miguel, Shawn Powers: w21148
We discuss how evidence and theory can be combined to provide insight on the appropriate subsidy level for health products, focusing on the specific case of deworming. Although intestinal worm infections can be treated using safe, low-cost drugs, some have challenged the view that mass school-based deworming should be a policy priority. We review well-identified research which both uses experimental or quasi-experimental methods to demonstrate causal relationships and adequately accounts for epidemiological externalities from deworming treatment, including studies of deworming campaigns in the Southern United States, Kenya, and Uganda. The existing evidence shows consistent positive impacts on school participation in the short run and on academic test scores, employment, and income in the ...

Published: Amrita Ahuja & Sarah Baird & Joan Hamory Hicks & Michael Kremer & Edward Miguel & Shawn Powers, 2015. "When Should Governments Subsidize Health? The Case of Mass Deworming," The World Bank Economic Review, vol 29(suppl 1), pages S9-S24. citation courtesy of

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