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Submitted on: 02 July 2003.
Revised on: 05 August 2003.
Accepted on: 15 August 2003.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS
Submitted on: 24 November 2000.
Revised on: 02 February 2001.
Accepted on: 21 February 2001.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS
Submitted on: 17 August 2016.
Revised on: 03 December 2016.
Accepted on: 23 December 2016.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS
Submitted on: 07 March 2007.
Revised on: 23 May 2007.
Accepted on: 03 June 2007.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS
Submitted on: 27 January 2014.
Revised on: 15 May 2014.
Accepted on: 10 June 2014.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS
http://reply.papertrans.cn/2/199/19852/19852-18.png
Submitted on: 21 December 2001.
Revised on: 20 April 2002.
Accepted on: 24 May 2002.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS
Submitted on: 07 May 1998.
Revised on: 30 May 1998.
Accepted on: 15 July 1998.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES C-APPLIED STATISTICS