Puhani, Patrick A. - Zentrum für Europäische Wirtschaftsforschung (ZEW) - 1997
This paper gives a short overview of Monte Carlo studies on the usefulness of Heckman?s (1976, 1979) two?step estimator for estimating a selection model. It shows that exploratory work to check for collinearity problems is strongly recommended before deciding on which estimator to apply. In the...