The paper studies the regulatory design in an industry where the regulated downstream provider of services to final consumers purchases the necessary inputs from an upstream supplier. The model is closely inspired by the UK regulatory mechanism for the railway network. Its philosophy is one of...

This paper deals with the optimal behaviour of a single public firm in an oligopolistic market where there are also n private firms. The public firm aims at maximizing a social welfare function depending on producers' and consumers' surplus. In section 3 it is shown that there exists an optimal...