Submitted on: 17 September 2013.
Revised on: 13 January 2014.
Accepted on: 26 February 2014.
___________________JOURNAL OF BUSINESS & ECONOMIC STATISTICS
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Submitted on: 04 February 2008.
Revised on: 19 April 2008.
Accepted on: 17 June 2008.
___________________JOURNAL OF BUSINESS & ECONOMIC STATISTICS
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Submitted on: 05 October 2013.
Revised on: 30 December 2013.
Accepted on: 12 February 2014.
___________________JOURNAL OF BUSINESS & ECONOMIC STATISTICS
Submitted on: 08 February 1999.
Revised on: 04 April 1999.
Accepted on: 19 April 1999.
___________________JOURNAL OF BUSINESS & ECONOMIC STATISTICS
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