http://reply.papertrans.cn/1/92/9194/9194-31.png
http://reply.papertrans.cn/1/92/9194/9194-32.png
http://reply.papertrans.cn/1/92/9194/9194-33.png
Submitted on: 17 September 1998.
Revised on: 20 October 1998.
Accepted on: 14 December 1998.
___________________European Journal of Law and Economics
Submitted on: 21 March 1998.
Revised on: 06 May 1998.
Accepted on: 27 May 1998.
___________________European Journal of Law and Economics
Submitted on: 24 January 2022.
Revised on: 13 May 2022.
Accepted on: 04 July 2022.
___________________European Journal of Law and Economics