w York: John Wiley & Sons Inc，1959.
[3] Bain J . Barriers to New Competition [M]. Cambridge, Mass: Harvard UniversityPress, 1956.
[4] Batt Rosemary. Explaining wage inequality in telecommunications services:Custome rsegmentation, human resource practices and union declme[J].Industrial and Labor Relations Review, 2001(10): 19-28
[5] Boyer, Mai cel. A Habit Forming Optimal Growth Model [J]. InternationalEconomic Review, 1978(19)
[6] Boyer，Maicel. Rational Demand and Expenditures Patterns under HabitFormation [J]. Journal of Economic Theory, 1983(31).
[7] Brynjolfsson, Erik，Michael D Smith, Jeffrey H
