@inbook{NBERc8266,
 Crossref = "NBERkrue82-1",
 title = "Effective Protection and the Distribution of Personal Income by Sector in Colombia",
 author = "T. Paul Schultz",
 BookTitle = "Trade and Employment in Developing Countries, vol. 2: Factor Supply and Substitution",
 Publisher = "University of Chicago Press",
 pages = "83-148",
 year = "1982",
 URL = "http://www.nber.org/chapters/c8266",
}
@book{NBERkrue82-1,
 title = "Trade and Employment in Developing Countries, vol. 2: Factor Supply and Substitution",
 author = "Anne O. Krueger",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1982",
 URL = "http://www.nber.org/books/krue82-1",
}