Submitted on: 03 December 2017.
Revised on: 11 February 2018.
Accepted on: 07 March 2018.
___________________Estudios Demograficos y Urbanos
Submitted on: 01 February 2018.
Revised on: 07 May 2018.
Accepted on: 30 May 2018.
___________________Estudios Demograficos y Urbanos
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Submitted on: 16 October 2015.
Revised on: 14 November 2015.
Accepted on: 12 December 2015.
___________________Estudios Demograficos y Urbanos
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Submitted on: 27 January 2002.
Revised on: 24 April 2002.
Accepted on: 07 May 2002.
___________________Estudios Demograficos y Urbanos
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