Thinking about Program Evaluation |
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Academic Press addition addressed agencies analysis assignment mechanism assignment variable Association assumptions average beneficiaries Berk causal effect Children's Television Workshop comparison group concerns consumption control group costs cross-sectional determine drug estimates evaluation research example excellent existing experimental group experimentals and controls forecasting goals gram homeless impact assessment implemented important income individuals instance internal validity interrupted time series intervention involuntary commit issues John Wiley Journal large number measure ment multivariate statistical needs assessments negative income tax opportunity costs outcome particular policies and programs policy space policymakers population possible practice preintervention pretest procedures Program Evaluation program impact qualitative question random assignment randomized experiments regression discontinuity designs research design Rossi Sage sample series designs Sesame Street social problem social programs social science statistical adjustments statistical conclusion validity statistical inference survey T-cell count tion treatment effect trends true experiments undertaken units