@inbook {11952, title = {Labor Regulations, Unions, and Social Protection in Developing Countries: Market Distortion or Efficient Institutions}, booktitle = {Handbook of Development Economics}, year = {2009}, note = {NBER WP $\#$14,789}, publisher = {Ellsevier, BV}, organization = {Ellsevier, BV}, address = {North Holland}, author = {Richard Freeman} }