@inbook{NBERc10892,
 Crossref = "NBERpote95-1",
 title = "A Major Risk Approach to Health Insurance Reform",
 author = "Martin Feldstein and Jonathan Gruber",
 BookTitle = "Tax Policy and the Economy, Volume 9",
 Publisher = "MIT Press",
 pages = "103-130",
 year = "1995",
 month = "January",
 URL = "http://www.nber.org/chapters/c10892",
}
@book{NBERpote95-1,
 title = "Tax Policy and the Economy, Volume 9",
 author = "James M. Poterba",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "MIT Press",
 year = "1995",
 URL = "http://www.nber.org/books/pote95-1",
}