The governance of corruption : an introduction -- The governance structures of corrupt exchanges -- Corruption as a normative system -- Bureaucratic corruption -- Political actors in the governance of corrupt exchanges -- The entrepreneurial management of corrupt exchanges -- Brokers in corruption networks : the role of middlemen -- Organized crime and corruption : mafias as enforcers in the market for corrupt exchange -- Snowball effects : how corruption may become endemic -- Conclusion : anti-corruption policy and the disarticulation of governance structures in corrupt exchanges.