@techreport{NBERw12702,
 title = "Repugnance as a Constraint on Markets",
 author = "Alvin E. Roth",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12702",
 year = "2006",
 month = "November",
 URL = "http://www.nber.org/papers/w12702",
}