5Anderson, S. P. , De Palma, A. Demand for differentiated products, discrete-choice models and characteristics approach [ J ]. Review of Economic Studies, 1989, (56).
6Friedman, J. Oligopoly and the theory of Games [ M ]. North-Holland, Amsterdam, 1997.
7Gonzalez-Maestre, M. Divisionalization with spatial competition [ J ]. mimeo, Universidad Au-tonoma de Barcelona, 1995.
8Rysman, M. How many franchises in a market? [J]. International Journal of Industrial Organization, 2001, (19).
9Schwartz, M. and Thompson, K A. Divisionalization and entry deterrence [ J ]. Quarterly Journal of Economics, 1986,101 (2).
10Tan, Guofu, Lasheng Yuan. Strategic incentives of divestitures of competing conglomerates [ J ]. International Journal of Industrial Organization,2003, (21).
