@inbook{NBERc6616,
 Crossref = "NBERrugg74-1",
 title = "Uses of Tax Files Combined with Field Surveys",
 author = "Benjamin Okner and Joseph Pechman",
 BookTitle = "The Role Of The Computer In Economic And Social Research in Latin America",
 Publisher = "NBER",
 pages = "67-88",
 year = "1974",
 URL = "http://www.nber.org/chapters/c6616",
}
@book{NBERrugg74-1,
 title = "The Role Of The Computer In Economic And Social Research in Latin America",
 author = "Nancy D. Ruggles",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1974",
 URL = "http://www.nber.org/books/rugg74-1",
}