@inbook{NBERc10289,
 Crossref = "NBERogur01-1",
 title = "Concentration and Persistence of Health Care Costs for the Aged",
 author = "Seiritsu Ogura and Reiko Suzuki",
 BookTitle = "Aging Issues in the United States and Japan",
 Publisher = "University of Chicago Press",
 pages = "187-222",
 year = "2001",
 month = "January",
 URL = "http://www.nber.org/chapters/c10289",
}
@book{NBERogur01-1,
 title = "Aging Issues in the United States and Japan",
 author = "Seiritsu Ogura and Toshiaki Tachibanaki and David A. Wise",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2001",
 URL = "http://www.nber.org/books/ogur01-1",
}