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Are There International R&D Spillovers Among Randomly Matched Trade Partners? A Response to Keller

Author

Listed:
  • Mr. David T. Coe
  • Mr. Willy A Hoffmaister

Abstract

Keller (1998) reexamines Coe and Helpman’s (1995) analysis of international R&D spillovers focusing on the weights used to define the foreign R&D capital stock. Keller creates “random” weights and shows that they give rise to positive estimates of international R&D spillovers, casting doubts on the robustness of Coe and Helpman’s findings. We show that Keller’s “random” weights are essentially simple averages with a random error. We derive alternative random weights and present regressions showing that when they are used to define the foreign R&D capital stock, the estimated international R&D spillover estimates are nonexistent, as would be expected.

Suggested Citation

  • Mr. David T. Coe & Mr. Willy A Hoffmaister, 1999. "Are There International R&D Spillovers Among Randomly Matched Trade Partners? A Response to Keller," IMF Working Papers 1999/018, International Monetary Fund.
    • Handle: RePEc:imf:imfwpa:1999/018
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