@techreport{NBERw12175,
 title = "Democratic Capital: The Nexus of Political and Economic Change",
 author = "Torsten Persson and Guido Tabellini",
 institution = "National Bureau of Economic Research",
 type = "Working Paper",
 series = "Working Paper Series",
 number = "12175",
 year = "2006",
 month = "April",
 URL = "http://www.nber.org/papers/w12175",
}