@inbook{NBERc6577,
 Crossref = "NBERgold94-1",
 title = "The Political Economy of Immigration Restriction in the United States, 1890 to 1921",
 author = "Claudia Goldin",
 BookTitle = "The Regulated Economy: A Historical Approach to Political Economy",
 Publisher = "University of Chicago Press",
 pages = "223-258",
 year = "1994",
 month = "January",
 URL = "http://www.nber.org/chapters/c6577",
}
@book{NBERgold94-1,
 title = "The Regulated Economy: A Historical Approach to Political Economy",
 author = "Claudia Goldin and Gary D. Libecap",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1994",
 URL = "http://www.nber.org/books/gold94-1",
}