Learning from Experiments when Context Matters
نویسنده
چکیده
Suppose a policymaker in context j is contemplating expanding some social program in hopes of raising welfare as measured by Y . She confronts two contradictory pieces of evidence. The first is analysis of a representative sample of eligible individuals, i, some of whom self-selected into the program. Researchers have used this observational data to estimate the “effect” of program participation, T , using the following regression:
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