Submitted on: 12 October 2016.
Revised on: 27 November 2016.
Accepted on: 11 January 2017.
___________________JOURNAL OF BUSINESS & ECONOMIC STATISTICS
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Submitted on: 04 March 2009.
Revised on: 15 May 2009.
Accepted on: 15 June 2009.
___________________JOURNAL OF BUSINESS & ECONOMIC STATISTICS
Submitted on: 14 June 2008.
Revised on: 10 September 2008.
Accepted on: 07 October 2008.
___________________JOURNAL OF BUSINESS & ECONOMIC STATISTICS