@techreport{NBERw12653,
 title = "Political Competitiveness",
 author = "Casey B. Mulligan and Kevin K. Tsui",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12653",
 year = "2006",
 month = "October",
 URL = "http://www.nber.org/papers/w12653",
}