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标题：Reconciling Evaluations of the Millennium Villages Project
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作者：Andrew Gelman ; Shira Mitchell ; Jeffrey Sachs 等
期刊名称：Statistics and Public Policy
电子版ISSN：2330-443X
出版年度：2022
卷号：9
期号：1
页码：1-7
DOI：10.1080/2330443X.2021.2019152
语种：English
出版社：Taylor and Francis Ltd
摘要：The Millennium Villages Project was an integrated rural development program carried out for a decade in 10 clusters of villages in sub-Saharan Africa starting in 2005, and in a few other sites for shorter durations. An evaluation of the 10 main sites compared to retrospectively chosen control sites estimated positive effects on a range of economic, social, and health outcomes (Mitchell et al. 2018). More an outside group performed a prospective controlled (but also nonrandomized) evaluation of one of the shorterduration sites and reported smaller or null results (Masset et al. 2020). Although these two conclusions seem contradictory, the differences can be explained by the fact that Mitchell et al. studied 10 sites where the project was implemented for 10 years, and Masset et al. studied one site with a program lasting less than 5 years, as well as differences in inference and framing. Insights from both evaluations should be valuable in considering future development efforts of this sort. Both studies are consistent with a larger picture of positive average impacts (compared to untreated villages) across a broad range of outcomes, but with effects varying across sites or requiring an adequate duration for impacts to be manifested.