Price and Variety in the Spokes Model

Yongmin Chen  and Michael H. Riordan

The Economic Journal, 2007

http://www.blackwell-synergy.com/doi/abs/10.1111/j.1468-0297.2007.02063.x

请帮忙找到正式发表的或是2007年修改后的版本，谢谢。thank you for your help.

[此贴子已经被作者于2008-5-19 12:02:30编辑过]