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Submitted on: 31 August 2019.
Revised on: 04 November 2019.
Accepted on: 25 November 2019.
___________________Journal of Interdisciplinary Economics
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Submitted on: 16 December 2013.
Revised on: 08 February 2014.
Accepted on: 08 March 2014.
___________________Journal of Interdisciplinary Economics
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