@inbook{NBERc6705,
 Crossref = "NBERbald91-1",
 title = "Introduction to "Empirical Studies of Commercial Policy"",
 author = "Robert E. Baldwin",
 BookTitle = "Empirical Studies of Commercial Policy",
 Publisher = "University of Chicago Press, 1991",
 pages = "1-8",
 year = "1991",
 month = "January",
 URL = "http://www.nber.org/chapters/c6705",
}
@book{NBERbald91-1,
 title = "Empirical Studies of Commercial Policy",
 author = "Robert E. Baldwin",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press, 1991",
 year = "1991",
 URL = "http://www.nber.org/books/bald91-1",
}