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Submitted on: 07 July 2012.
Revised on: 23 September 2012.
Accepted on: 15 November 2012.
___________________Annual Review of Financial Economics
Submitted on: 07 October 2009.
Revised on: 14 January 2010.
Accepted on: 28 February 2010.
___________________Annual Review of Financial Economics
Submitted on: 12 August 2011.
Revised on: 24 September 2011.
Accepted on: 16 November 2011.
___________________Annual Review of Financial Economics
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Submitted on: 09 June 2006.
Revised on: 03 September 2006.
Accepted on: 12 October 2006.
___________________Annual Review of Financial Economics