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Submitted on: 04 October 2003.
Revised on: 10 January 2004.
Accepted on: 29 February 2004.
___________________JOURNAL OF CRIMINAL JUSTICE---ELSEVIER
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Submitted on: 23 January 2004.
Revised on: 20 March 2004.
Accepted on: 14 May 2004.
___________________JOURNAL OF CRIMINAL JUSTICE---ELSEVIER