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Submitted on: 19 September 2009.
Revised on: 16 December 2009.
Accepted on: 13 February 2010.
___________________Econometrics Journal---OXFORD UNIV PRESS
Submitted on: 25 September 2001.
Revised on: 23 December 2001.
Accepted on: 18 February 2002.
___________________Econometrics Journal---OXFORD UNIV PRESS
Submitted on: 10 January 2003.
Revised on: 24 April 2003.
Accepted on: 26 May 2003.
___________________Econometrics Journal---OXFORD UNIV PRESS
Submitted on: 29 July 2014.
Revised on: 15 October 2014.
Accepted on: 16 November 2014.
___________________Econometrics Journal---OXFORD UNIV PRESS
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Submitted on: 12 November 2002.
Revised on: 14 February 2003.
Accepted on: 14 April 2003.
___________________Econometrics Journal---OXFORD UNIV PRESS
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Submitted on: 03 July 1999.
Revised on: 01 October 1999.
Accepted on: 29 November 1999.
___________________Econometrics Journal---OXFORD UNIV PRESS
Submitted on: 13 October 2013.
Revised on: 01 January 2014.
Accepted on: 20 January 2014.
___________________Econometrics Journal---OXFORD UNIV PRESS