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This paper proposes a self-contained reference for both policy makers and scholars who want to address the problem of efficiency and effectiveness of local public transport (LPT), with special emphasis on urban transit, in a sound empirical way. Framing economic efficiency studies into a transport planning perspective, it offers a critical discussion of the existing empirical studies, relating them to the main methodological approaches used. The connection between such perspectives and Operations Research studies dealing with scheduling and tactical design of public transport services is also developed. The comprehensive classification of selected relevant dimensions of the empirical literature, namely inputs, outputs, kind of data analysed, methods adopted and policy relevant questions addressed, and the systematic investigation of their interrelationships allows us to summarise the existing literature and to propose desirable developments and extensions for future studies in the field.

In this paper we study the economic behaviour of the suppliers of a set of advanced telecommunications services with a joint adoption cost (common access facilities, learning process, etc.). In fixing the two-part tariffs for their services the suppliers have to share the burden of leaving to the users a surplus sufficient to cover the adoption cost. The lack of coordination in supplying a critical mass of services or in the pricing decisions has high changes to result in suboptimal or unviable diffusion of the new technology as a whole. We present a static optimization model of user behaviour, and derive access and usage demand with a two-part tariff and a joint adoption cost. We compare noncooperative and cooperative market equilibria in a duopoly with perfect information; finally we discuss the extension of our analysis to the case of imperfect information in a dynamic setting.

Parallel trade (PT) is a practice related to arbitrage operations in international trade. We provide a rationale for PT as an opportunistic behaviour by an international wholesaler who is privately informed about market demands in two countries where a multinational firm operates. This alternative theory of PT contributes to an explanation of why PT has gained considerable importance in various industries, and why it has not yet resulted in price convergence across relevant countries. Indeed, we find that asymmetric information enlarges the scope for PT, relative to complete information, and possibly increases crosscountry differences in prices. The European Commission supports PT as a means to achieve the integration of national markets, to the benefit of all citizens. However, under asymmetric information, consumers benefit from PT only with a high volume of parallel imports (e.g., when arbitrage costs are low); otherwise competition among wholesalers can be an effective substitute for PT. Furthermore, an important implication of PT is the transfer of profits from the manufacturer to the wholesaler. Therefore, in R&D-intensive industries, such as pharmaceuticals, policy makers should anticipate the likely consequences of PT under asymmetric information on the long-run incentives to innovate.