Addison, J. T., Pedro Portugal and Hugo de Almeida Vilares (2023); “Union membership density and wages: The role of worker, firm, and job-title heterogeneity“, Journal of Econometrics, 233(2), pp. 612-632.
![Imagem de Hugo Vilares](https://cefup.fep.up.pt/wp-content/uploads/2022/08/Hugo-Vilares-2022.jpg)
Addison, J. T., Pedro Portugal and Hugo de Almeida Vilares (2023); “Union membership density and wages: The role of worker, firm, and job-title heterogeneity“, Journal of Econometrics, 233(2), pp. 612-632.