Submitted on: 22 December 2004.
Revised on: 16 March 2005.
Accepted on: 03 April 2005.
___________________JOURNAL OF PUBLIC POLICY & MARKETING
http://reply.papertrans.cn/2/191/19016/19016-32.png
http://reply.papertrans.cn/2/191/19016/19016-33.png
Submitted on: 19 October 2009.
Revised on: 09 February 2010.
Accepted on: 01 March 2010.
___________________JOURNAL OF PUBLIC POLICY & MARKETING
http://reply.papertrans.cn/2/191/19016/19016-35.png
http://reply.papertrans.cn/2/191/19016/19016-36.png