Key issues in intervention research: A p
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Mark W. Lipsey
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Article
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1996
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John Wiley and Sons
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English
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Over the kist tcrw dec~idcs, theory arid prcicticc in the ,field of program etlaluarion have generuted LI rich array of concepts and methods jor research on the Cffwtiveness o f sociul programs. This paper attempts to .summririzc the 1es.vons ,from program evaluation research that might ust?fifillly