@inbook{NBERc6059,
 Crossref = "NBERborj00-1",
 title = "Social Security Benefits of Immigrants and U.S. Born",
 author = "Alan L. Gustman and Thomas L. Steinmeier",
 BookTitle = "Issues in the Economics of Immigration",
 Publisher = "University of Chicago Press",
 pages = "309-350",
 year = "2000",
 month = "January",
 URL = "http://www.nber.org/chapters/c6059",
}
@book{NBERborj00-1,
 title = "Issues in the Economics of Immigration",
 author = "George J. Borjas",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2000",
 URL = "http://www.nber.org/books/borj00-1",
}