@inbook{NBERc7708,
 Crossref = "NBERfeld83-2",
 title = "Simulating Nonlinear Tax Rules and Nonstandard Behavior: An Application to the Tax Treatment of Charitable Contributions ",
 author = "Martin S. Feldstein and Lawrence Lindsey",
 BookTitle = "Behavioral Simulation Methods in Tax Policy Analysis",
 Publisher = "University of Chicago Press",
 pages = "139-172",
 year = "1983",
 URL = "http://www.nber.org/chapters/c7708",
}
@book{NBERfeld83-2,
 title = "Behavioral Simulation Methods in Tax Policy Analysis",
 author = "Martin Feldstein",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1983",
 URL = "http://www.nber.org/books/feld83-2",
}