Kuckulenz, Anja; Maier, Michael - In: Journal of Economics and Statistics (Jahrbuecher fuer … 226 (2006) 1, pp. 24-40
Empirical Work on the wage impact of training has noted that unobserved heterogeneity of training participants should play a role. The expected return to training, which partly depends on unobservable characteristics, is likely to be a crucial criterion in the decision to take part in training...