8Greif,Avner ,1996,"Contracing,Enforcement and Efficiency:Economics Beyond Law",the Paper for the Annual Bank Conference on Development Economics,World Bank,April 25-26,1996,Washington,D.C.
9Green,E.and R.Porter,1984."Noncooperative Collusion under Imperfect Price Information",Econometrica,52:87-100.
10Huang,and Wu,Ho-Mou,1994,"More Order without More Law:A Theory of Social Norms and Organizational Culture",Journal of Law,Economics and Organization.
