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Cited by

• 2001Identifying network density and scale economies for Japanese water supply organizations125 cited
• 2006Regulatory Contracts and Cost Efficiency: Stochastic Frontier Evidence from the Italian Local Public Transport115 cited
• 1997Cost Savings and Productivity in the Railroad Industry104 cited
• 2001Density and Integration Effects on Class I U.S. Freight Railroads102 cited
• 2001The Cost of Environmental Protection92 cited
• 2003Cost efficiency in the retail payment networks: first evidence from the Italian credit card system83 cited
• 2001Vertical relationships for the European railway industry79 cited
• 1994Productivity differences in multiple output industries: An empirical application to electricity distribution74 cited
• 1993Cost effects of mergers and deregulation in the U.S. Rail industry70 cited
• 1991Rail Costs and Capital Adjustments in a Quasi-Regulated Environment68 cited
• 2008An analysis of cost efficiency in Swiss multi-utilities57 cited
• 2006Cost efficiency in the Swiss gas distribution sector52 cited
• 2004Regulating Public Transit Networks: How do Urban‐Intercity Diversification and Speed‐up Measures Affect Firms’ Cost Performance?47 cited
• 2006Cost-Effectiveness of Railway Infrastructure Renewal Maintenance