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Mark W. Lipsey; Christina Weiland; Hirokazu Yoshikawa; Sandra Jo Wilson; Kerry G. Hofer – Educational Evaluation and Policy Analysis, 2015
Much of the currently available evidence on the causal effects of public prekindergarten programs on school readiness outcomes comes from studies that use a regression-discontinuity design (RDD) with the age cutoff to enter a program in a given year as the basis for assignment to treatment and control conditions. Because the RDD has high internal…
Descriptors: Preschool Education, Preschool Children, School Readiness, School Entrance Age
Peer reviewed Peer reviewed
Rush, David – American Journal of Public Health, 1984
Comments on an article by Kotelchuck and colleagues concerning the benefits of WIC participation on pregnancy outcomes. Raises methodological considerations, especially the effects of duration of WIC participation and benefits, and the problem of matching study subjects with controls. (GC)
Descriptors: Nutrition, Prenatal Influences, Program Evaluation, Research Methodology
Carifio, James; And Others – 1987
In September 1984, a Vocational Education Data System (VEDS) follow-up survey was conducted of all 5,267 students who had graduated from Massachusetts public community colleges in 1982-83. Of these graduates, 1,881 (35.7%) returned the survey, and 3,386 (64.3%) did not. A subsequent study was conducted to compare the characteristics of survey…
Descriptors: College Graduates, Community Colleges, Followup Studies, Outcomes of Education