Submitted on: 17 April 1999.
Revised on: 13 May 1999.
Accepted on: 14 June 1999.
___________________ECONOMICA---WILEY
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Submitted on: 13 March 2022.
Revised on: 12 May 2022.
Accepted on: 01 July 2022.
___________________ECONOMICA---WILEY
Submitted on: 29 July 2006.
Revised on: 12 October 2006.
Accepted on: 11 December 2006.
___________________ECONOMICA---WILEY
Submitted on: 30 October 2021.
Revised on: 27 December 2021.
Accepted on: 19 January 2022.
___________________ECONOMICA---WILEY
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Submitted on: 02 November 2002.
Revised on: 08 January 2003.
Accepted on: 05 February 2003.
___________________ECONOMICA---WILEY
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Submitted on: 11 January 2022.
Revised on: 11 February 2022.
Accepted on: 06 March 2022.
___________________ECONOMICA---WILEY