"All efforts to organize collective action,
whether by an external ruler, an entrepreneur, or a set of
principals who wish to gain collective benefits, must
address a common set of problems. These have to do with
coping with free riding, solving commitment problems,
arranging for the supply of new institutions, and monitoring
individual compliance with sets of rules."
Elinor Ostrom, Governing the Commons, Cambridge University
Press, 1990, p. 27.