@inbook{NBERc7825,
 Crossref = "NBERfran98-1",
 title = "Tariff Phase-Outs: Theory and Evidence from GATT and NAFTA",
 author = "Carsten Kowalczyk and Donald R. Davis",
 BookTitle = "The Regionalization of the World Economy",
 Publisher = "University of Chicago Press",
 pages = "227-258",
 year = "1998",
 month = "January",
 URL = "http://www.nber.org/chapters/c7825",
}
@book{NBERfran98-1,
 title = "The Regionalization of the World Economy",
 author = "Jeffrey A. Frankel",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1998",
 URL = "http://www.nber.org/books/fran98-1",
}