@inbook{NBERc0081,
 Crossref = "NBERclar06-1",
 title = "Is Poland the Next Spain?",
 author = "Francesco Caselli and Silvana Tenreyro",
 BookTitle = "NBER International Seminar on Macroeconomics 2004",
 Publisher = "The MIT Press",
 pages = "459-533",
 year = "2006",
 month = "September",
 URL = "http://www.nber.org/chapters/c0081",
}
@book{NBERclar06-1,
 title = "NBER International Seminar on Macroeconomics 2004",
 author = "Richard H. Clarida and Jeffrey Frankel and Francesco Giavazzi and Kenneth D. West",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "The MIT Press",
 year = "2006",
 URL = "http://www.nber.org/books/clar06-1",
}