In a contribution to Economics Letters, Pereira and Martins (2002) point out that there exists a positive link between risk and return in education. We perform a sensitivity analysis and argue that the evidence on this link is not robust.

We study the impact of education on within-groups wage inequality using quantile-regression techniques and US data for the period 1980 to 1987. Our contribution consists of comparing estimates based on a standard Mincer equation with estimates based on a modified Mincer equation in which past...

Using Portuguese data from the 2001 wave of the European Community Household Panel, we analyse to what extent the endogeneity of schooling affects the estimation of the total impact of schooling on within-groups wage inequality by means of quantile-regression techniques. We conclude that the...

This article proposes a novel procedure to test whether firms compete à la Cournot or perfectly collude when firms' conduct is allowed to be heterogeneous along the conditional distribution of price–cost margins. We apply the procedure to a panel of quarterly data for 177 mobile-voice...