Submitted on: 31 January 2025.
Revised on: 29 May 2025.
Accepted on: 19 July 2025.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
Submitted on: 15 April 2013.
Revised on: 09 May 2013.
Accepted on: 27 June 2013.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
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Submitted on: 02 July 2009.
Revised on: 18 October 2009.
Accepted on: 01 December 2009.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
Submitted on: 04 February 2008.
Revised on: 13 March 2008.
Accepted on: 23 April 2008.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
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