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International R&D spillovers and unobserved common shocks

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  • Diego-Ivan Ruge-Leiva

Abstract

This paper investigates the effects of the domestic and foreign R&D weighted by bilateral imports on productivity accounting for the heterogeneous impact of unobserved micro and macroeconomic common shocks, which are modeled in a multifactor error structure. Using a panel of 50 economies from 1970-2011, I find that when unobserved common shocks are not regarded, as has been done by the literature in this area, estimates of domestic R&D and foreign R&D might be biased and inconsistent. Once unobserved common shocks are accounted for, by allowing for heterogeneous technology coefficients, significant estimates become more sizable, consistent and not seriously biased in most cases. However, these estimates might be capturing not only returns to domestic R&D and trade-related knowledge spillovers, but also unobserved common spillovers and other effects. This indicates that knowledge spillovers and effects of unknown form cannot be easily separated. Therefore, unobserved common shocks should be considered when estimating returns to domestic R&D and international R&D spillovers.

Suggested Citation

  • Diego-Ivan Ruge-Leiva, 2014. "International R&D spillovers and unobserved common shocks," Working Papers 08/14, Instituto Universitario de Análisis Económico y Social.
  • Handle: RePEc:uae:wpaper:0814
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    More about this item

    Keywords

    Productivity; Spillovers; Cross-Section Dependence; Unobserved Common Shocks.;

    JEL classification:

    • C23 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Models with Panel Data; Spatio-temporal Models
    • O11 - Economic Development, Innovation, Technological Change, and Growth - - Economic Development - - - Macroeconomic Analyses of Economic Development
    • O30 - Economic Development, Innovation, Technological Change, and Growth - - Innovation; Research and Development; Technological Change; Intellectual Property Rights - - - General
    • O40 - Economic Development, Innovation, Technological Change, and Growth - - Economic Growth and Aggregate Productivity - - - General

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