Submitted on: 04 January 2004.
Revised on: 13 April 2004.
Accepted on: 02 June 2004.
___________________JAPANESE ECONOMIC REVIEW---SPRINGER HEIDELBERG
Submitted on: 05 October 2020.
Revised on: 28 January 2021.
Accepted on: 19 March 2021.
___________________JAPANESE ECONOMIC REVIEW---SPRINGER HEIDELBERG
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Submitted on: 28 December 2016.
Revised on: 16 March 2017.
Accepted on: 17 April 2017.
___________________JAPANESE ECONOMIC REVIEW---SPRINGER HEIDELBERG
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Submitted on: 25 June 1999.
Revised on: 16 September 1999.
Accepted on: 22 October 1999.
___________________JAPANESE ECONOMIC REVIEW---SPRINGER HEIDELBERG