![[logo]](/naked/logo.gif "[logo]"){kind=logo}
Categories |
Report: Technical Methods Report: Estimation and Identification of the Complier Average Causal Effect Parameter in Education RCTsCategoriesAreasPRACTITIONER:group practice and professional learning AuthorsPeter Z. Schochet Published2009 PublisherNational Center for Education Evaluation and Regional Assistance, Institute of Education Sciences, U.S. Department of Education AbstractIn randomized control trials (RCTs) in the education field, the complier average causal effect (CACE) parameter is often of policy interest, because it pertains to intervention effects for students who receive a meaningful dose of treatment services. This report uses a causal inference and instrumental variables framework to examine the identification and estimation of the CACE parameter for two-level clustered RCTs. The report also provides simple asymptotic variance formulas for CACE impact estimators measured in nominal and standard deviation units. In the empirical work, data from ten large RCTs are used to compare significance findings using correct CACE variance estimators and commonly-used approximations that ignore the estimation error in service receipt rates and outcome standard deviations. Our key finding is that the variance corrections have very little effect on the standard errors of standardized CACE impact estimators. Across the examined outcomes, the correction terms typically raise the standard errors by less than 1 percent, and change p-values at the fourth or higher decimal place. Files |
 SearchTagsacademic access accommodations accountability achievement activities address alliance alternate american approach assessment assistance based behavior blind building center challenges change child childhood children classroom collaborative collection college community comprehensive connections create culturally curriculum design development disabilities discusses disproportionality distribution district diverse documents dropout early education effective efforts elementary emotional engaging english equitable equity evaluation evidence examines experiences families federal findings framework funding general grade group guide health identified impact implementation improvement including inclusive information inquiry instruction intervening intervention issues language leadership learning level linguistically literacy making measures model module monitoring national opportunities outcomes parents participant partnerships performance planning policy positive postsecondary practice practitioner preparation presentations prevention principals process professional programs progress provide public quality questions reading readiness recommendations reform report research resources responsive results review school secondary services skills social special standards state strategies students study success support survey systemic teachers technical topical transition understanding universal urban working years young youth
|
