Submitted on: 29 June 2014.
Revised on: 14 August 2014.
Accepted on: 02 October 2014.
___________________Estudios Demograficos y Urbanos
Submitted on: 21 April 2021.
Revised on: 19 May 2021.
Accepted on: 21 June 2021.
___________________Estudios Demograficos y Urbanos
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Submitted on: 28 December 2003.
Revised on: 20 April 2004.
Accepted on: 17 May 2004.
___________________Estudios Demograficos y Urbanos
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Submitted on: 22 August 2011.
Revised on: 19 September 2011.
Accepted on: 13 October 2011.
___________________Estudios Demograficos y Urbanos