The pre-program earnings dip and the determinants of participation in a social program : implications for simple program evaluation strategies - Heckman, James J.; ASmith, Jeffrey A. (Cambridge National Bureau of Economic Research, 1999)
Keywords: Occupational training -- Econometric models. -- United States; Wages -- Econometric models. -- United States; Occupational training -- Evaluation -- Statistical methods. -- United States; United States -- Job Training Partnership Act; Occupational training -- Research -- Methodology