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Submitted on: 16 September 1998.
Revised on: 24 September 1998.
Accepted on: 01 October 1998.
Revista Economia---PONTIFICIA UNIV CATOLICA PERU
Submitted on: 30 June 2002.
Revised on: 12 July 2002.
Accepted on: 27 July 2002.
NULL
Submitted on: 15 March 2022.
Revised on: 29 March 2022.
Accepted on: 04 April 2022.
Revista Economia---PONTIFICIA UNIV CATOLICA PERU
Submitted on: 20 January 2014.
Revised on: 09 February 2014.
Accepted on: 05 March 2014.
Revista Economia---PONTIFICIA UNIV CATOLICA PERU
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Submitted on: 11 February 2011.
Revised on: 06 March 2011.
Accepted on: 19 March 2011.
Revista Economia---PONTIFICIA UNIV CATOLICA PERU