Heckman, James J. <br/><br/>
The pre-program earnings DIP and the determinants of participation in a social program : implications for simple program evaluation strategies 

 - Cambridge, Mass :  National Bureau of Economic Research,  1999 
 - 41 
<br/><br/><label>Subjects--Topical Terms: </label><br/>UNITED STATES. JOB TRAINING PARTNERSHIP ACT<br/>OCCUPATIONAL TRAINING--UNITED STATES--EVALUATION<br/>OCCUPATIONAL TRAINING--RESEARCH--ECONOMETRIC MODELS
<br/><br/><label>LC Class. No.: </label>HD5715.2  / H424P