Submitted on: 24 November 2005.
Revised on: 27 January 2006.
Accepted on: 15 March 2006.
___________________EKONOMICKY CASOPIS---INST ECONOMICS RESEARCH SAS & INST FORECASTING CSPS SAS
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Submitted on: 19 August 2001.
Revised on: 16 December 2001.
Accepted on: 12 February 2002.
___________________EKONOMICKY CASOPIS---INST ECONOMICS RESEARCH SAS & INST FORECASTING CSPS SAS
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