@inbook{NBERc10071,
 Crossref = "NBERheck04-1",
 title = "Determinants of Labor Demand in Colombia.  1976–1996",
 author = "Mauricio Cardenas and Raquel Bernal",
 BookTitle = "Law and Employment: Lessons from Latin America and the Caribbean",
 Publisher = "University of Chicago Press",
 pages = "229-272",
 year = "2004",
 month = "August",
 URL = "http://www.nber.org/chapters/c10071",
}
@book{NBERheck04-1,
 title = "Law and Employment: Lessons from Latin America and the Caribbean",
 author = "James J. Heckman and Carmen Pagés",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2004",
 URL = "http://www.nber.org/books/heck04-1",
}