@inbook{NBERc9247,
 Crossref = "NBERconf77-2",
 title = "Welfare Measures for Regional Policies",
 author = "William D. Nordhaus",
 BookTitle = "Explorations in Economic Research, Volume 4, number 3 (New Directions in Federal Economic Development Programs)",
 Publisher = "NBER",
 pages = "101-116",
 year = "1977",
 month = "July",
 URL = "http://www.nber.org/chapters/c9247",
}
@book{NBERconf77-2,
 title = "Explorations in Economic Research, Volume 4, number 3 (New Directions in Federal Economic Development Programs)",
 author = "Edward K. Smith",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1977",
 URL = "http://www.nber.org/books/conf77-2",
}