@inbook{NBERc8374,
 Crossref = "NBERhaus85-1",
 title = "Income-Maintenance Policy and Work Effort: Learning from Experiments and Labor-Market Studies",
 author = "Frank Stafford",
 BookTitle = "Social Experimentation",
 Publisher = "University of Chicago Press",
 pages = "95-144",
 year = "1985",
 URL = "http://www.nber.org/chapters/c8374",
}
@book{NBERhaus85-1,
 title = "Social Experimentation",
 author = "Jerry A. Hausman and David A. Wise",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1985",
 URL = "http://www.nber.org/books/haus85-1",
}