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dc.contributor.authorHeckman, James Josephen_US
dc.contributor.authorMoon, Seong Hyeoken_US
dc.contributor.authorPinto, Rodrigoen_US
dc.contributor.authorSavelyev, Peter A.en_US
dc.contributor.authorYavitz, Adamen_US
dc.description.abstractSocial experiments are powerful sources of information about the effectiveness of interventions. In practice, initial randomization plans are almost always compromised. Multiple hypotheses are frequently tested. Significant effects are often reported with p-values that do not account for preliminary screening from a large candidate pool of possible effects. This paper develops tools for analyzing data from experiments as they are actually implemented. We apply these tools to analyze the influential HighScope Perry Preschool Program. The Perry program was a social experiment that provided preschool education and home visits to disadvantaged children during their preschool years. It was evaluated by the method of random assignment. Both treatments and controls have been followed from age 3 through age 40. Previous analyses of the Perry data assume that the planned randomization protocol was implemented. In fact, as in many social experiments, the intended randomization protocol was compromised. Accounting for compromised randomization, multiple-hypothesis testing, and small sample sizes, we find statistically significant and economically important program effects for both males and females. We also examine the representativeness of the Perry study.en_US
dc.publisher|aInstitute for the Study of Labor (IZA) |cBonnen_US
dc.relation.ispartofseries|aDiscussion paper series // Forschungsinstitut zur Zukunft der Arbeit |x5095en_US
dc.subject.keywordearly childhood interventionen_US
dc.subject.keywordcompromised randomizationen_US
dc.subject.keywordsocial experimenten_US
dc.subject.keywordmultiple-hypothesis testingen_US
dc.titleAnalyzing social experiments as implemented: A reexamination of the evidence from the HighScope Perry Preschool Programen_US
dc.type|aWorking Paperen_US

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