@inbook{NBERc12752,
 Crossref = "NBERacem12-2",
 title = "Comment on "Roads to Prosperity or Bridges to Nowhere? Theory and Evidence on the Impact of Public Infrastructure Investment"",
 author = "Valerie Ramey",
 BookTitle = "NBER Macroeconomics Annual 2012, Volume 27",
 Publisher = "University of Chicago Press",
 year = "2012",
 month = "July",
 URL = "http://www.nber.org/chapters/c12752",
}
@book{NBERacem12-2,
 title = "NBER Macroeconomics Annual 2012, Volume 27",
 author = "Daron Acemoglu and Jonathan Parker and Michael Woodford",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "2013",
 URL = "http://www.nber.org/books/acem12-2",
}