Submitted on: 24 April 2018.
Revised on: 23 May 2018.
Accepted on: 13 June 2018.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
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Submitted on: 23 April 2003.
Revised on: 09 July 2003.
Accepted on: 26 August 2003.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
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Submitted on: 11 June 2024.
Revised on: 12 August 2024.
Accepted on: 21 September 2024.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
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Submitted on: 22 May 2003.
Revised on: 17 July 2003.
Accepted on: 14 August 2003.
___________________Journal of Econometrics---ELSEVIER SCIENCE SA
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