Submitted on: 26 September 2006.
Revised on: 08 January 2007.
Accepted on: 05 March 2007.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES A-STATISTICS IN SOCIETY
http://reply.papertrans.cn/2/199/19849/19849-12.png
Submitted on: 29 November 1998.
Revised on: 04 March 1999.
Accepted on: 18 March 1999.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES A-STATISTICS IN SOCIETY
Submitted on: 12 June 2003.
Revised on: 11 August 2003.
Accepted on: 23 August 2003.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES A-STATISTICS IN SOCIETY
Submitted on: 29 March 2009.
Revised on: 04 May 2009.
Accepted on: 04 June 2009.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES A-STATISTICS IN SOCIETY
http://reply.papertrans.cn/2/199/19849/19849-16.png
http://reply.papertrans.cn/2/199/19849/19849-17.png
Submitted on: 10 May 2014.
Revised on: 23 June 2014.
Accepted on: 29 July 2014.
___________________JOURNAL OF THE ROYAL STATISTICAL SOCIETY SERIES A-STATISTICS IN SOCIETY
http://reply.papertrans.cn/2/199/19849/19849-19.png
http://reply.papertrans.cn/2/199/19849/19849-20.png