@inbook{NBERc3865,
 Crossref = "NBERingr78-1",
 title = "The Influence of Age of Dwellings on Housing Expenditures and on the Location of Households by Income",
 author = "Richard F. Muth",
 BookTitle = "Residential Location and Urban Housing Markets",
 Publisher = "NBER",
 pages = "1-26",
 year = "1978",
 URL = "http://www.nber.org/chapters/c3865",
}
@book{NBERingr78-1,
 title = "Residential Location and Urban Housing Markets",
 author = "Gregory K. Ingram",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1978",
 URL = "http://www.nber.org/books/ingr78-1",
}