@article{albarran2009inequality,
  title={Inequality for wage earners and self-employed: evidence from panel data},
  author={Albarran, Pedro and Carrasco, Raquel and Martinez-Granado, Maite},
  journal={Oxford Bulletin of Economics and Statistics},
  year={2009},
  volume={71},
  number={4},
  pages={491--518},
  doi={10.1111/j.1468-0084.2009.00549.x}
}