@article{Roberts1997,
author = {Roberts, M. and Skoufias, E.},
title= {The long-run demand for skilled and unskilled labor in Colombian manufacturing plants},
year = {1997},
doi = {10.1162/003465397556700},
journal = {Review of Economics and Statistics},
volume = {79},
number = {2},
pages = {330--334},
}