@techreport{NBERw13138,
 title = "Labor Unrest and the Quality of Production: Evidence from the Construction Equipment Resale Market",
 author = "Alexandre Mas",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13138",
 year = "2007",
 month = "May",
 URL = "http://www.nber.org/papers/w13138",
}