4Henk G. Privatization and the public/private partnership [ J]. Journal of Management Engineer, 1998, 14 (4) :28 - 29.
5Gordon Mills. Welfare and profit divergence for a tolled link in a road network [ J]. Journal of Transport Economics and Policy. 1995,(29) :137 - 146.
6Timothy B, Maitreesh G. Government versus private ownership of public goods [ J ]. The Quarterly Journal of Economics, 2001,116 (4) :1343 - 1372.
7Oliver H, Andrei S, Robert WV. The proper scope of government: theory and an application to prisons [ J ]. The Quarterly Journal of Economies, 1997,112 (4) : 1126 - 1161.
8Laffont JJ, Martimort D. The theory of incentives: the principal- agent model [ M ]. Princeton: Princeton University Press, 2002. 145 - 148.
