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Submitted on: 11 February 2010.
Revised on: 30 April 2010.
Accepted on: 19 May 2010.
___________________Annals of Applied Statistics---INST MATHEMATICAL STATISTICS-IMS
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Submitted on: 19 January 2014.
Revised on: 05 May 2014.
Accepted on: 09 June 2014.
___________________Annals of Applied Statistics---INST MATHEMATICAL STATISTICS-IMS
Submitted on: 02 April 2009.
Revised on: 20 July 2009.
Accepted on: 13 September 2009.
___________________Annals of Applied Statistics---INST MATHEMATICAL STATISTICS-IMS
Submitted on: 07 July 2012.
Revised on: 31 August 2012.
Accepted on: 28 October 2012.
___________________Annals of Applied Statistics---INST MATHEMATICAL STATISTICS-IMS
Submitted on: 20 October 2007.
Revised on: 17 January 2008.
Accepted on: 03 March 2008.
___________________Annals of Applied Statistics---INST MATHEMATICAL STATISTICS-IMS