Submitted on: 06 February 2025.
Revised on: 26 March 2025.
Accepted on: 09 April 2025.
___________________Empirical Economics---PHYSICA-VERLAG GMBH & CO
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Submitted on: 13 October 2011.
Revised on: 03 January 2012.
Accepted on: 04 February 2012.
___________________Empirical Economics---PHYSICA-VERLAG GMBH & CO
Submitted on: 24 July 2023.
Revised on: 08 September 2023.
Accepted on: 24 September 2023.
___________________Empirical Economics---PHYSICA-VERLAG GMBH & CO
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