The paper shows why considering a number of education-dependent covariates in a wage equation decreases the coefficient of education in that equation. This result is illustrated empirically with a meta-analysis for Portugal. The education coefficient decreases when covariates are used that can...

Many biases plague the analysis of whether employers share rents with their employees, unlike what is predicted by the competitive labour market model. Using a Portuguese matched employer-employee panel, this article is one of the first to address these biases in three complementary ways: (1)...