Submitted on: 07 January 2005.
Revised on: 12 February 2005.
Accepted on: 09 April 2005.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
Submitted on: 13 September 2018.
Revised on: 27 December 2018.
Accepted on: 05 February 2019.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
Submitted on: 27 January 2003.
Revised on: 27 March 2003.
Accepted on: 08 April 2003.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
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Submitted on: 21 January 2021.
Revised on: 07 March 2021.
Accepted on: 01 May 2021.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
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Submitted on: 09 April 2022.
Revised on: 11 May 2022.
Accepted on: 02 June 2022.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
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Submitted on: 26 June 2000.
Revised on: 21 July 2000.
Accepted on: 07 August 2000.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA