Unobserved Heterogeneity and International Benchmarking in Public Transport

Astrid Cullman (), Mehdi Farsi and Massimo Filippini
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Astrid Cullman: German Institute for Economic Research DIW Berlin, Department of Innovation, Manufacturing, Service, Berlin, Germany
Authors registered in the RePEc Author Service: Astrid Cullmann

No 09-65, CEPE Working paper series from CEPE Center for Energy Policy and Economics, ETH Zurich

Abstract: We analyze the technical efficiency of German and Swiss urban public transport companies by means of SFA. In transport networks we might face different network structures or complexities, not observed, but influencing the production process. The unobserved factors are typically modeled as separable factors. However, we argue that the entire production process is organized around different network structures. Therefore, they are inevitably non-separable from the observed inputs and outputs. The adopted econometric model is a random coefficient stochastic frontier model. We estimate an input distance function for the years 1991 to 2006. The results underline the presence of unobserved non-separable factors.

Pages: 34 pages
Date: 2009-08
New Economics Papers: this item is included in nep-eff and nep-ure
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Citations: View citations in EconPapers (1)

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Related works:
Working Paper: Unobserved Heterogeneity and International Benchmarking in Public Transport (2010)
Working Paper: Unobserved Heterogeneity and International Benchmarking in Public Transport (2009)
Working Paper: Unobserved Heterogeneity and International Benchmarking in Public Trasport (2009)
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