At once with the development of money as medium of exchange, the feudal lords found out an easy way to obtain more monetary resources by monopolizing the coins’ mint. As result, they used to ask a certain percent from the gold quantity that people wanted to transform in coins (call brassage)....

The behaviour of the economic agent – customer is a rational type of behaviour in order to maximize the satisfaction achieved through the use of commodities. In order to determine a rational behaviour, we start from the premise that every costumer has complete and accurate information on: the...