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Submitted on: 04 March 2013.
Revised on: 02 June 2013.
Accepted on: 17 July 2013.
___________________JOURNAL OF POPULATION ECONOMICS
Submitted on: 27 March 2023.
Revised on: 11 May 2023.
Accepted on: 25 June 2023.
___________________JOURNAL OF POPULATION ECONOMICS
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