@techreport{NBERw0913,
 title = "Panel Data",
 author = "Gary Chamberlain",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "913",
 year = "1982",
 month = "June",
 URL = "http://www.nber.org/papers/w0913",
}