Traditional econometric analysis concentrate on classical methods which are far from suitable handling actual economic problems. Modern econometric analysis tries to develop new approaches from an economic perspective. As a consequence, there is less of a unified econometric theory than in...

In their IZA Discussion Paper 10247, Johansson and Lee claim that the main result (Proposition 3) in Abbring and Van den Berg (2003b) does not hold. We show that their claim is incorrect. At a certain point within their line of reasoning, they make a rather basic error while transforming one...