01114nas a2200181   4500000000100000008004100001260004100042653001400083653002000097100001300117700001300130700001300143700001300156700001200169245004600181856004300227520066200270       2020                            d  bNational Bureau of Economic Research10aDeworming10aEconomic impact1 aHamory J1 aMiguel E1 aWalker M1 aKremer M1 aBaird S00aTwenty Year Economic Impacts of Deworming  uhttps://www.nber.org/papers/w27611.pdf3 aThis study exploits a randomized school health intervention that provided deworming treatment to Kenyan children and utilizes longitudinal data to estimate impacts on economic outcomes up to 20 years later. The effective respondent tracking rate was 84%. Individuals who received 2 to 3 additional years of childhood deworming experience an increase of 14% in consumption expenditure, 13% in hourly earnings, 9% in non-agricultural work hours, and are 9% more likely to live in urban areas. Most effects are concentrated among males and older individuals. Given deworming's low cost, a conservative annualized social internal rate of return estimate is 37%.