Do workers benefit from the education of their co-workers? This question is examined first by introducing a model of on-the-job schooling, which argues that educated workers may transfer part of their general skills to uneducated workers and that this spillover is affected by the degrees of...

Does employers' association (EA) membership affect wages? Such effects, positive or negative, could follow from increased productivity, employer collusion, or other channels. We analyse this question drawing on matched employer-employee panel data, including time-varying EA affiliation and...

Does employers' association (EA) membership affect the wages paid by firms? Such effects could follow from several channels, including increased productivity, different management practices, or employer collusion promoted by EA affiliation. We test these hypotheses drawing on detailed matched...

Several recent studies use the schooling and wage variation between monozygotic twins to estimate the return to schooling. In this paper, we summarize the results from this literature, and we examine the implications of endogenous determination of which twin goes to school longer and of...

Several recent studies use the schooling and wage variation between monozygotic twins to estimate the return to schooling. In this paper, we summarize the results from this literature, and we examine the implications of endogenous determination of which twin goes to school longer and of...

We show why considering a number of education-dependent covariates in the wage equation decreases coefficient of education in the wage equation. We use a meta-analysis of results for Portugal to show, empirically, that this is the case. The coefficient decreases when we use covariates that can...