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Do We Need Experimental Data to Evaluate the Impact of Manpower Training on Earnings?
Peer reviewed Peer reviewed
Heckman, James J.; And Others – Evaluation Review, 1987
Recent evaluations of manpower training claim that: (1) nonexperimental methods produce unreliable estimates of program impacts and (2) randomized experiments are necessary for reliability. National Supported Work Demonstration data are used to reexamine nonexperimental estimates of net program impact on posttraining earnings of high school…
Descriptors: Adult Education, Effect Size, Employment Programs, Evaluation Methods
How Precise Are Evaluations of Employment and Training Programs: Evidence from a Field Experiment.
Peer reviewed Peer reviewed
LaLonde, Robert; Maynard, Rebecca – Evaluation Review, 1987
Two studies used experimental data to evaluate nonexperimental methods of program evaluation for employment and training programs. Results of both studies indicated that the nonexperimental methods might not accurately replicate the experimental estimates. Also, new methods for constructing comparison groups yielded little improvement over…
Descriptors: Adult Education, Employment Programs, Evaluation Methods, Evaluation Problems