http://reply.papertrans.cn/2/165/16414/16414-11.png
http://reply.papertrans.cn/2/165/16414/16414-12.png
Submitted on: 19 August 2015.
Revised on: 21 September 2015.
Accepted on: 18 October 2015.
___________________Journal of Economic and Administrative Sciences
Submitted on: 13 April 2001.
Revised on: 12 July 2001.
Accepted on: 08 September 2001.
___________________Journal of Economic and Administrative Sciences
Submitted on: 14 November 2013.
Revised on: 14 February 2014.
Accepted on: 12 March 2014.
___________________Journal of Economic and Administrative Sciences
http://reply.papertrans.cn/2/165/16414/16414-16.png
Submitted on: 12 June 2022.
Revised on: 06 September 2022.
Accepted on: 21 October 2022.
___________________Journal of Economic and Administrative Sciences
Submitted on: 09 January 2001.
Revised on: 07 March 2001.
Accepted on: 26 April 2001.
___________________Journal of Economic and Administrative Sciences
http://reply.papertrans.cn/2/165/16414/16414-19.png
http://reply.papertrans.cn/2/165/16414/16414-20.png