@inbook{NBERc3488,
 Crossref = "NBERgros72-1",
 title = "AN EMPIRICAL FORMULATION OF THE MODEL",
 author = "Michael Grossman",
 BookTitle = "The Demand for Health: A Theoretical and Empirical Investigation",
 Publisher = "UMI",
 pages = "39-54",
 year = "1972",
 URL = "http://www.nber.org/chapters/c3488",
}
@book{NBERgros72-1,
 title = "The Demand for Health: A Theoretical and Empirical Investigation",
 author = "Michael Grossman",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "UMI",
 year = "1972",
 URL = "http://www.nber.org/books/gros72-1",
}