@techreport{NBERw13639,
 title = "Inefficient Credit Booms",
 author = "Guido Lorenzoni",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13639",
 year = "2007",
 month = "November",
 URL = "http://www.nber.org/papers/w13639",
}