Public finances from everywhere have followed along the centuries, as it was natural, some periods when they had to accommodate to the needs resulted from the economic and social life. Their mission was not at all a simple one. To conceive the taxes and rates (dues) system, to ensure a...

Auctions purchases represent an effective mechanism for public authorities, designed to provide the buyer (public authority), products and services with a convenient time to complete the transaction and the option to set a minimum price. In this paper we will study the problem of the optimal...