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The Broader Benefits of Transportation Infrastructure

Author

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  • Ian Sue Wing

    (Boston University)

  • William P. Anderson

    (Boston University)

  • T. R. Lakshmanan

    (Boston University)

Abstract

Assessments of the economic benefits of transportation infrastructure investments are critical to good policy decisions. At present, most such assessments are based of two types of studies: micro-scale studies in the form of cost-benefit analysis (CBA) and macro-scale studies in the form of national or regional econometric analysis. While the former type takes a partial equilibrium perspective and may therefore miss broader economic benefits, the latter type is too widely focused to provide much guidance concerning specific infrastructure projects or programs. Intermediate (meso-scale) analytical frameworks, which are both specific with respect to the infrastructure improvement in question and comprehensive in terms of the range of economic impacts they represent, are needed. This paper contributes to the development of meso-scale analysis via the specification of a computable general equilibrium (CGE) model that can assess the broad economic impact of improvements in transportation infrastructure networks. The model builds on recent CGE formulations that seek to capture the productivity penalty on firms and the utility penalty on households imposed by congestion (Meyers and Proost, 1997; Conrad, 1997) and others that model congestion via the device of explicit household time budgets (Parry and Bento, 2001, 2002). The centerpiece of our approach is a representation of the process through which markets for non-transport commodities and labor create derived demands for freight, shopping and commuting trips. Congestion, which arises due to a mismatch between the derived demand for trips and infrastructure capacity, is modeled as increased travel time along individual network links. Increased travel time impinges on the time budgets of households and reduces the ability of transportation service firms to provide trips using given levels of inputs. These effects translate into changes in productivity, labor supply, prices and income. A complete algebraic specification of the model is provided, along with details of implementation and a discussion of data resources needed for model calibration and application in policy analysis.

Suggested Citation

  • Ian Sue Wing & William P. Anderson & T. R. Lakshmanan, 2007. "The Broader Benefits of Transportation Infrastructure," OECD/ITF Joint Transport Research Centre Discussion Papers 2007/10, OECD Publishing.
    • Handle: RePEc:oec:itfaaa:2007/10-en
    DOI: 10.1787/234743834644
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    Cited by:

    1. Dubrovsky, Valery & Yaroshevich, Natalya & Kuzmin, Evgeny, 2016. "Transactional approach in assessment of operational performance of companies in transport infrastructure," MPRA Paper 72001, University Library of Munich, Germany.
    2. Nikolaos Thomopoulos & Susan Grant-Muller, 2013. "Incorporating equity as part of the wider impacts in transport infrastructure assessment: an application of the SUMINI approach," Transportation, Springer, vol. 40(2), pages 315-345, February.
    3. Robson, Edward N. & Wijayaratna, Kasun P. & Dixit, Vinayak V., 2018. "A review of computable general equilibrium models for transport and their applications in appraisal," Transportation Research Part A: Policy and Practice, Elsevier, vol. 116(C), pages 31-53.

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