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Submitted on: 17 April 2016.
Revised on: 27 May 2016.
Accepted on: 04 July 2016.
___________________Journal of Economics---SPRINGER WIEN
Submitted on: 07 August 2005.
Revised on: 15 November 2005.
Accepted on: 29 December 2005.
___________________Journal of Economics---SPRINGER WIEN
Submitted on: 29 September 2019.
Revised on: 16 November 2019.
Accepted on: 07 December 2019.
___________________Journal of Economics---SPRINGER WIEN
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Submitted on: 12 February 2001.
Revised on: 08 June 2001.
Accepted on: 08 July 2001.
___________________Journal of Economics---SPRINGER WIEN
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Submitted on: 20 April 2007.
Revised on: 10 June 2007.
Accepted on: 07 July 2007.
___________________Journal of Economics---SPRINGER WIEN