@inbook{NBERc8390,
 Crossref = "NBERhest99-1",
 title = "Purchasing Power Parities for Medical Care and Health Expenses: An Informal Report",
 author = "Giuliano Amerini",
 BookTitle = "International and Interarea Comparisons of Income, Output, and Prices",
 Publisher = "University of Chicago Press",
 pages = "233-238",
 year = "1999",
 month = "January",
 URL = "http://www.nber.org/chapters/c8390",
}
@book{NBERhest99-1,
 title = "International and Interarea Comparisons of Income, Output, and Prices",
 author = "Alan Heston and Robert E. Lipsey",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1999",
 URL = "http://www.nber.org/books/hest99-1",
}