1Barzel, Yoram.A Theory Of the State[M].NewYork:Cambridge University Press, 2002:114.
2Oliver,Pamela.Formal Models of Collective Action[J].Annual Review of Sociology, 1993, (19):273.
3Olson, Mancur.The Logic of Collective Action[M].Cambridge:Harvard University Press, 1971:160, 14,47,51.
4Mckean,Roland.Issues in Defense Economics[C].NewYork:Columbia University Press, 1967:26.
5Sandier,Todd.Collective Action[M].Ann Arbor:The University of Michigan Press, 1992:3,79.
6Marwell, Gerald, Ames, Ruth.Experiments on the Provision of Public Goods.Ⅰ.Resources, Interests, Group Size, and the Free-Rider Problem[J].The American Journal of Sociology, 1979, (6): 1359.
