Additional information on:

a) the 3^rd International Conference can be obtained from the web page:
http://www.economia.uniroma2.it/conferenze/icabr99

b) the 4^th International Conference can be obtained from the web page:
http://www.economia.uniroma2.it/conferenze/icabr00

b) the 5^th International Conference can be obtained from the web page:
http://www.economia.uniroma2.it/conferenze/icabr01

b) the 6^th International Conference can be obtained from the web page:
http://www.economia.uniroma2.it/conferenze/icabr