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Struttura di costo e rendimenti di scala nelle imprese di trasporto pubblico locale di medie-grandi dimensioni




In this paper we analyse the cost structure of a sample of Italian Local Public Transport (LPT) companies operating in large urban centres, so as to extend the evidence of some recent studies focused on small-sized and medium-sized operators. The main focus is to verify the presence and the extent of both scale and density economies. Technological characteristics of LPT systems are analysed by estimating a variable cost function model, which includes firm-specific fixed effects and considers three alternative supply-oriented output measures. The results show the presence of short-run and long-run scale economies, as well as of economies of network density, for both the average sample firm and companies belonging to the highest percentile (large-sized operators), regardless of the type of service provided (urban or mixed). This evidence suggests that, from a technological point of view, a proper LPT network should at least include a large urban centre and should be extended so as to embrace the intercity service too, while a regulatory policy aimed at fragmenting the served area in various sub-networks would imply a loss of productive efficiency.

Suggested Citation

  • Carlo Cambini & Ivana Paniccia & Massimiliano Piacenza & Davide Vannoni, 2005. "Struttura di costo e rendimenti di scala nelle imprese di trasporto pubblico locale di medie-grandi dimensioni," CERIS Working Paper 200516, Institute for Economic Research on Firms and Growth - Moncalieri (TO) ITALY -NOW- Research Institute on Sustainable Economic Growth - Moncalieri (TO) ITALY.
  • Handle: RePEc:csc:cerisp:200516

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    Cited by:

    1. Giovanni Fraquelli, 2007. "Optimal Scale and Efficiency of the Italian Public Utilities," L'industria, Società editrice il Mulino, issue 1, pages 205-228.

    More about this item


    trasporto pubblico locale; regolazione; dimensione ottima minima; economie di scala e di densità;

    JEL classification:

    • L51 - Industrial Organization - - Regulation and Industrial Policy - - - Economics of Regulation
    • L92 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Railroads and Other Surface Transportation
    • R41 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - Transportation Economics - - - Transportation: Demand, Supply, and Congestion; Travel Time; Safety and Accidents; Transportation Noise


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