@inbook{NBERc10874,
 Crossref = "NBERpote93-1",
 title = "Front matter to "Tax Policy and the Economy, Volume 7"",
 author = "James M. Poterba",
 BookTitle = "Tax Policy and the Economy, Volume 7",
 Publisher = "MIT Press",
 pages = "-11--6",
 year = "1993",
 month = "January",
 URL = "http://www.nber.org/chapters/c10874",
}
@book{NBERpote93-1,
 title = "Tax Policy and the Economy, Volume 7",
 author = "James Poterba",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "MIT Press",
 year = "1993",
 URL = "http://www.nber.org/books/pote93-1",
}