@techreport{NBERw13665,
 title = "Strike Three: Umpires' Demand for Discrimination",
 author = "Christopher A. Parsons and Johan Sulaeman and Michael C. Yates and Daniel S. Hamermesh",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "13665",
 year = "2007",
 month = "November",
 URL = "http://www.nber.org/papers/w13665",
}