Submitted on: 29 October 1999.
Revised on: 08 February 2000.
Accepted on: 20 February 2000.
___________________Finance Research Letters---ACADEMIC PRESS INC ELSEVIER SCIENCE
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Submitted on: 04 January 2014.
Revised on: 21 February 2014.
Accepted on: 16 April 2014.
___________________Finance Research Letters---ACADEMIC PRESS INC ELSEVIER SCIENCE
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Submitted on: 09 September 2003.
Revised on: 06 October 2003.
Accepted on: 29 October 2003.
___________________Finance Research Letters---ACADEMIC PRESS INC ELSEVIER SCIENCE
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