@inbook{NBERc6151,
 Crossref = "NBERdavi85-1",
 title = "Measuring the Benefits of Income Maintenance Programs",
 author = "David Betson and Jacques van der Gaag",
 BookTitle = "Horizontal Equity, Uncertainty, and Economic Well-Being",
 Publisher = "University of Chicago Press",
 pages = "215-238",
 year = "1985",
 URL = "http://www.nber.org/chapters/c6151",
}
@book{NBERdavi85-1,
 title = "Horizontal Equity, Uncertainty, and Economic Well-Being",
 author = "Martin David and Timothy Smeeding",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1985",
 URL = "http://www.nber.org/books/davi85-1",
}