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Roads and Innovation

Author

Listed:
  • Ajay Agrawal

    (University of Toronto and NBER)

  • Alberto Galasso

    (University of Toronto and NBER)

  • Alexander Oettl

    (Georgia Institute of Technology)

Abstract

We exploit historical data on planned highways, railroads, and exploration routes as sources of exogenous variation in order to estimate the effect of interstate highways on regional innovation: a 10% increase in a region's stock of highways causes a 1.7% increase in regional patenting over a five-year period. In terms of the mechanism, we report evidence that roads facilitate local knowledge flows, increasing the likelihood that innovators access knowledge inputs from local but more distant neighbors. Thus, transportation infrastructure may spur regional growth above and beyond the more commonly discussed agglomeration economies predicated on an inflow of new workers.

Suggested Citation

  • Ajay Agrawal & Alberto Galasso & Alexander Oettl, 2017. "Roads and Innovation," The Review of Economics and Statistics, MIT Press, vol. 99(3), pages 417-434, July.
    • Handle: RePEc:tpr:restat:v:99:y:2017:i:3:p:417-434
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    More about this item

    JEL classification:

    • L91 - Industrial Organization - - Industry Studies: Transportation and Utilities - - - Transportation: General
    • O33 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - Technological Change: Choices and Consequences; Diffusion Processes
    • O47 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - Empirical Studies of Economic Growth; Aggregate Productivity; Cross-Country Output Convergence

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