Submitted on: 22 March 2014.
Revised on: 05 April 2014.
Accepted on: 29 April 2014.
Thunderbird International Business Review
http://reply.papertrans.cn/3/296/29516/29516-32.png
Submitted on: 08 August 2012.
Revised on: 19 August 2012.
Accepted on: 30 August 2012.
Thunderbird International Business Review
http://reply.papertrans.cn/3/296/29516/29516-34.png
http://reply.papertrans.cn/3/296/29516/29516-35.png
http://reply.papertrans.cn/3/296/29516/29516-36.png