@techreport{NBERw13458,
 title = "Is the "Surge" Working?  Some New Facts",
 author = "Michael Greenstone",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13458",
 year = "2007",
 month = "October",
 URL = "http://www.nber.org/papers/w13458",
}