International Knowledge Diffusion and Home-Bias Effect: Do USPTO and EPO Patent Citations Tell the Same Story?

30 Pages Posted: 4 Aug 2010

See all articles by Emanuele Bacchiocchi

Emanuele Bacchiocchi

Università degli Studi di Milano

Fabio Montobbio

University of Insubria

Date Written: 2010-01

Abstract

This paper estimates the international diffusion of technical knowledge using patent citations. We control for self-citations and for procedural differences between patent offices using equivalent patents. We find that (1) there are clear biases in patent examination processes that generate citations in the two offices; (2) at the EPO there is a strong localization effect at the country level, and the size is comparable to that found at the USPTO; (3) technological fields have different properties of diffusion in the two patent offices that do not depend on a patent office bias; (4) using EPO data, the US is not the leading country in terms of citations made and received, as occurs at the USPTO.

Suggested Citation

Bacchiocchi, Emanuele and Montobbio, Fabio, International Knowledge Diffusion and Home-Bias Effect: Do USPTO and EPO Patent Citations Tell the Same Story? (2010-01). Scandinavian Journal of Economics, Vol. 112, Issue 3, pp. 441-470, September 2010, Available at SSRN: https://ssrn.com/abstract=1653060 or http://dx.doi.org/10.1111/j.1467-9442.2010.01614.x

Emanuele Bacchiocchi (Contact Author)

Università degli Studi di Milano ( email )

Milan, 20122
Italy

Fabio Montobbio

University of Insubria ( email )

Via Ravasi 2
Varese, 21100 21100
Italy

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