Submitted on: 28 February 2017.
Revised on: 17 March 2017.
Accepted on: 27 March 2017.
NULL
Submitted on: 24 August 2006.
Revised on: 12 September 2006.
Accepted on: 08 October 2006.
Revista Economia y Sociedad---UNIV NACL, EDITORIAL
http://reply.papertrans.cn/3/270/26904/26904-13.png
http://reply.papertrans.cn/3/270/26904/26904-14.png
http://reply.papertrans.cn/3/270/26904/26904-15.png
http://reply.papertrans.cn/3/270/26904/26904-16.png
http://reply.papertrans.cn/3/270/26904/26904-17.png
http://reply.papertrans.cn/3/270/26904/26904-18.png
Submitted on: 28 September 2011.
Revised on: 05 October 2011.
Accepted on: 23 October 2011.
NULL
http://reply.papertrans.cn/3/270/26904/26904-20.png