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Economic Expertise and Large Infrastructures Projects: The 2019 Cost Benefit Analysis of the Lyon Turin Project
[Expertise économique et grandes infrastructures : l’analyse coûts- avantages du Lyon-Turin de 2019]

Author

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  • Jérôme Massiani

    (UNIMIB - Università degli Studi di Milano-Bicocca = University of Milano-Bicocca)

Abstract

This paper reviews the contribution of experts to the appraisal of large infrastructures, looking at the evaluation performed in 2019 in Italy by the Ministry of Infrastructures and Transports on the Lyon-Turin railway project. This evaluation had been initiated in a particular context, linked to a visible policy agenda and while the construction of the tunnel had already begun. The appraisal has produced surprising results, mostly counterintuitive and heavily criticized. We analyse these results and show how they can be valid, in that they would not result from inconsistency in the method but from the peculiar features of the project (low initial demand, high mode transfer compared with initial traffic, high road tax and toll levels). We also check the validity of some paradoxical results of the assessment. Moreover, the public debate has been made more difficult due to an inconsistency in EU evaluation Guidelines. Also, we analyse mechanisms that affect the credibility of experts and we find that the influence of experts in the public debate has little to see with the inherent consistency of the methods used.

Suggested Citation

  • Jérôme Massiani, 2023. "Economic Expertise and Large Infrastructures Projects: The 2019 Cost Benefit Analysis of the Lyon Turin Project [Expertise économique et grandes infrastructures : l’analyse coûts- avantages du Lyon-Turin de 2019]," Post-Print hal-04159527, HAL.
    • Handle: RePEc:hal:journl:hal-04159527
    DOI: 10.46298/cst.11605
    Note: View the original document on HAL open archive server: https://hal.science/hal-04159527v3
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