http://reply.papertrans.cn/2/190/18993/18993-31.png
http://reply.papertrans.cn/2/190/18993/18993-32.png
http://reply.papertrans.cn/2/190/18993/18993-33.png
Submitted on: 12 May 2002.
Revised on: 08 June 2002.
Accepted on: 03 July 2002.
___________________Journal of Public and Nonprofit Affairs
Submitted on: 13 April 2010.
Revised on: 01 August 2010.
Accepted on: 18 September 2010.
___________________Journal of Public and Nonprofit Affairs
http://reply.papertrans.cn/2/190/18993/18993-36.png