@inbook{NBERc7479,
 Crossref = "NBERshov92-1",
 title = "Canada-U.S. Free Trade and Pressures for Tax Coordination",
 author = "Roger H. Gordon",
 BookTitle = "Canada-U.S. Tax Comparisons",
 Publisher = "University of Chicago Press",
 pages = "75-96",
 year = "1992",
 month = "January",
 URL = "http://www.nber.org/chapters/c7479",
}
@book{NBERshov92-1,
 title = "Canada-U.S. Tax Comparisons",
 author = "John B. Shoven and John Whalley",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1992",
 URL = "http://www.nber.org/books/shov92-1",
}