When Should Governments Subsidize Health? The Case of Mass Deworming

Amrita Ahuja, Sarah Baird, Joan Hamory Hicks, Michael Kremer, Edward Miguel and Shawn Powers

The World Bank Economic Review, 2015, vol. 29, issue suppl_1, S9-S24

Abstract: 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 long run, while suggesting that most parents will not pay for deworming treatment that is not fully subsidized. There is also evidence for a fiscal externality through higher future tax revenue, which may exceed the cost of the program. Our analysis suggests that the economic benefits of school-based deworming programs are likely to exceed their costs in places where worm infestations are endemic. This would likely be the case even if the benefits were only a fraction of estimates in the existing literature.

Date: 2015
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Working Paper: When Should Governments Subsidize Health? The Case of Mass Deworming (2015)
Working Paper: When Should Governments Subsidize Health? The Case of Mass Deworming (2014)
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