The research on the relation between school quality and student achievement have many different results, but most analysts conclude that the school quality has little influence on student performance, as compared to background characteristics. However, there are evidences that difficulties using...

This paper presents a new assessment the Stolper-Samuelson Theorem, relaxing the neoclassical hypothesis of perfect factor mobility and wage flexibility. We build a model economy in which some sector face imperfect competition and workers are unionized in those sector, so that wages are not...

This paper aims to analyze the effects of payroll taxes on the determination of the degree of informality and the main indicators of the Brazilian labor market, considering both aggregate and disaggregate indicators by qualification level. For that purpose, a two- sector model is developed,...

This paper aims to understand the dynamic of the relative demand for skilled labor in Brazilian industry, during the last decade. Thus, presenting evidences that relative demand for skill increased overall in the period, it seeks to explain this movement, at least in part. For this, we test the...