“…The author wishes to thank Boubacar Ba and Salmana Cisse for valuable assistance with field-work, and Erling Berge, Espen Sjaastad and one anonymous reviewer for helpful comments. 22 See also the wider literature on CPR regimes: Ostrom [1992;; Singleton and Taylor [1992]; Bromley [1992]; Hackett [1992]; Hackett et al [1994;; Young [1995]; Alston, Eggertson, North (eds) [1996]; Hanna et al [1996]; Mearns [1996]; Meinzen-Dick and Jackson [1996]; Edwards and Stein [1998;; Leach, Mearns, Scoones, [1998]. 3 Politics is here defined as competition for power among interest groups and influence on decisions with effects on coordinated action in the management of CPRs.…”