Submitted on: 14 April 2015.
Revised on: 13 June 2015.
Accepted on: 02 July 2015.
___________________ANNALS OF THE INSTITUTE OF STATISTICAL MATHEMATICS
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Submitted on: 26 August 2003.
Revised on: 21 September 2003.
Accepted on: 14 October 2003.
___________________ANNALS OF THE INSTITUTE OF STATISTICAL MATHEMATICS
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Submitted on: 27 January 2006.
Revised on: 22 February 2006.
Accepted on: 12 April 2006.
___________________ANNALS OF THE INSTITUTE OF STATISTICAL MATHEMATICS