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Direct linkRaudenbush, Stephen W.; Martinez, Andres; Spybrook, Jessaca – Educational Evaluation and Policy Analysis, 2007
Interest has rapidly increased in studies that randomly assign classrooms or schools to interventions. When well implemented, such studies eliminate selection bias, providing strong evidence about the impact of the interventions. However, unless expected impacts are large, the number of units to be randomized needs to be quite large to achieve…
Descriptors: Statistical Analysis, Employment Programs, Intervention, Group Behavior
Download full textMaynard, Rebecca; And Others – 1979
An interim evaluation was conducted to determine the impact of the National Supported Work Demonstration (NSWD) on employment of four target groups: Aid for Dependent Children (AFDC) recipients, ex-drug-addicts, ex-offenders, and youths. The evaluation was based on data collected in interviews with 2,830 persons--1,419 of whom were offered…
Descriptors: Adults, Control Groups, Crime, Demonstration Programs
