Submitted on: 28 January 2019.
Revised on: 16 March 2019.
Accepted on: 29 April 2019.
___________________Cuadernos de Economia---UNIV NAC COLOMBIA, FAC CIENCIAS ECONOMICAS, CUADERNOS ECONOMIA
Submitted on: 07 November 2022.
Revised on: 23 December 2022.
Accepted on: 16 January 2023.
___________________Cuadernos de Economia---UNIV NAC COLOMBIA, FAC CIENCIAS ECONOMICAS, CUADERNOS ECONOMIA
http://reply.papertrans.cn/1/68/6744/6744-13.png
Submitted on: 14 October 2022.
Revised on: 21 November 2022.
Accepted on: 08 January 2023.
___________________Cuadernos de Economia---UNIV NAC COLOMBIA, FAC CIENCIAS ECONOMICAS, CUADERNOS ECONOMIA
Submitted on: 29 May 2015.
Revised on: 12 September 2015.
Accepted on: 22 September 2015.
___________________Cuadernos de Economia---UNIV NAC COLOMBIA, FAC CIENCIAS ECONOMICAS, CUADERNOS ECONOMIA
Submitted on: 14 June 2008.
Revised on: 16 August 2008.
Accepted on: 15 October 2008.
___________________Cuadernos de Economia---UNIV NAC COLOMBIA, FAC CIENCIAS ECONOMICAS, CUADERNOS ECONOMIA
http://reply.papertrans.cn/1/68/6744/6744-17.png
http://reply.papertrans.cn/1/68/6744/6744-18.png
http://reply.papertrans.cn/1/68/6744/6744-19.png
Submitted on: 24 January 2010.
Revised on: 20 April 2010.
Accepted on: 01 June 2010.
___________________Cuadernos de Economia---UNIV NAC COLOMBIA, FAC CIENCIAS ECONOMICAS, CUADERNOS ECONOMIA