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Technological convergence among US regions and states

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  • Catherine Co
  • Mark Wohar

Abstract

This paper employs unit root tests that allow for two endogenously determined structural breaks to study whether or not invention activities are converging across US regions/states. Using US patent data from 1929 to 1997, we find technological β-convergence in six of the nine Census regions, in 11 of the 14 leading states and in 28 of the 34 lagging states. Stochastic convergence, on the other hand, is found in three regions, in four leading states and in 17 lagging states. Carlino and Mills (1993) point out that both β- and stochastic convergence are necessary conditions for convergence. Putting these results together, we find convergence (both β- and stochastic) in invention activities in three regions, in three leading states and in 16 lagging states.

Suggested Citation

  • Catherine Co & Mark Wohar, 2004. "Technological convergence among US regions and states," Economics of Innovation and New Technology, Taylor & Francis Journals, vol. 13(2), pages 101-126.
    • Handle: RePEc:taf:ecinnt:v:13:y:2004:i:2:p:101-126
    DOI: 10.1080/10438590410001628107
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    2. John S. Landon-Lane & Catherine Y. Co & Myeong-Su Yun, 2006. "Inter-state dynamics of invention activities, 1930-2000," Journal of Applied Econometrics, John Wiley & Sons, Ltd., vol. 21(8), pages 1111-1134.
    3. Vicente German-Soto & Luis Gutiérrez Flores, 2015. "A Standardized Coefficients Model to Analyze the Regional Patents Activity: Evidence from the Mexican States," Journal of the Knowledge Economy, Springer;Portland International Center for Management of Engineering and Technology (PICMET), vol. 6(1), pages 72-89, March.
    4. Amit Batabyal & Peter Nijkamp, 2014. "Technology, Learning, and Long Run Economic Growth in Leading and Lagging Regions," ERSA conference papers ersa14p893, European Regional Science Association.
    5. Catherine Co & John List, 2004. "Is foreign direct investment attracted to 'knowledge creators'?," Applied Economics, Taylor & Francis Journals, vol. 36(11), pages 1143-1149.
    6. Mustafa Zuhal, 2023. "Technological Convergence in Emerging Economies: An Investigation with Unit Root Tests," Journal of Economic Policy Researches, Istanbul University, Faculty of Economics, vol. 10(2), pages 567-586, July.
    7. Barrette, Julie & Thiffault, Evelyne & Achim, Alexis & Junginger, Martin & Pothier, David & De Grandpré, Louis, 2017. "A financial analysis of the potential of dead trees from the boreal forest of eastern Canada to serve as feedstock for wood pellet export," Applied Energy, Elsevier, vol. 198(C), pages 410-425.

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