@techreport{NBERw13894,
 title = "Persistent Private Information",
 author = "Noah Williams",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13894",
 year = "2008",
 month = "March",
 URL = "http://www.nber.org/papers/w13894",
}