Transcription of LIMITATIONS OF EXPERIMENTS IN EDUCATION RESEARCH
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LIMITATIONS OF EXPERIMENTS IN EDUCATION RESEARCH
LIMITATIONS OF EXPERIMENTSIN EDUCATION RESEARCHA bstractResearch based on randomized EXPERIMENTS (along withhigh-quality quasi- EXPERIMENTS ) has gained traction ineducation circles in recent years. There is little doubtthis has been driven in large part by the shift in researchfunding strategy by the Department of EDUCATION s Insti-tute of EDUCATION Sciences under Grover Whitehurst slead, described in more detail in his article in this Whitmore SchanzenbachInstitute for Policy ResearchNorthwestern UniversityEvanston, IL 2012 Association for EDUCATION Finance and Policy219 LIMITATIONS OF EXPERIMENTS1. INTRODUCTIONThe field of EDUCATION policy has been a relatively late convert to experimentalevaluations, following far behind the lead set in areas such as job training(Lalonde1986) and international development (Duflo 2006). One mightwonder why it took so long for EDUCATION RESEARCH to adopt these part it might be because historically the federal government has playeda relatively small role in EDUCATION .
Change, Charles Payne (2008) criticizes urban school improvement strategies ... As a result, the treatment effect in year 1 may be substantially different from the treatment effect in year 4. In addition, in some cases the impacts are different for students of dif-ferent ages and/or build over time. These factors suggest that the longer-run
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