Impact Evaluation Research

The Impact Evaluation Working Paper Series represents all World Bank Policy Research Papers that make use of a rigorous causal identification strategy. The methodologies include experimental methods, such as randomized controlled trials (RCT), non- or quasi-experimental methods such as regression discontinuity designs, difference-in-differences, propensity score matching, as well as qualifying utilization of instrumental variables. It also includes review papers. 


Featured Research
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This paper investigates the consequences of granting politicians power over bureaucrats in the implementation of small-scale public infrastructure projects.
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The findings in this paper suggest that recurrent agricultural production shocks such as climate change, exacerbate failures in rural credit markets.
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The study finds that although transfer programs generally tend to reduce child labor, other policies risk increasing child labor, especially if they affect households' productive opportunities.
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Functioning democracy requires that citizens reward politicians who deliver benefits, yet there's surprisingly little causal evidence of changes in citizen views/behavior in response to specific
As agriculture becomes more technology-intensive, farmers’ ability to adapt to change will be key to growth.
The results consistently show that traditional credit use, formal or informal, is extremely low (across credit type, country, crop and farm size categories). Instead, farmers primarily
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Agricultural extension services are designed to facilitate the diffusion of innovations from lab to farm. In developing countries, they account for large shares of government expenditures in agriculture.

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