Submitted on: 27 June 2008.
Revised on: 16 October 2008.
Accepted on: 29 November 2008.
___________________Journal of the Statistical and Social Inquiry Society of Ireland
http://reply.papertrans.cn/2/199/19875/19875-12.png
http://reply.papertrans.cn/2/199/19875/19875-13.png
http://reply.papertrans.cn/2/199/19875/19875-14.png
http://reply.papertrans.cn/2/199/19875/19875-15.png
http://reply.papertrans.cn/2/199/19875/19875-16.png
http://reply.papertrans.cn/2/199/19875/19875-17.png
http://reply.papertrans.cn/2/199/19875/19875-18.png
http://reply.papertrans.cn/2/199/19875/19875-19.png
Submitted on: 22 August 2023.
Revised on: 19 December 2023.
Accepted on: 02 February 2024.
___________________Journal of the Statistical and Social Inquiry Society of Ireland