Patents, Citations and Innovations: Tracing the Links

56 Pages Posted: 30 Jul 2000 Last revised: 21 Mar 2021

See all articles by Manuel Trajtenberg

Manuel Trajtenberg

Tel Aviv University - Eitan Berglas School of Economics; Centre for Economic Policy Research (CEPR); National Bureau of Economic Research (NBER)

Date Written: December 1987

Abstract

The goal is to tackle anew the main problems encountered in using patent data in economic research, namely, the large variance in the value of patents, and the difficulties in matching patents with economic categories. The first is addressed with the aid of patent citations, the second with computerized search techniques for large databases. The proposed solutions are applied to the case of Computed Tomography (CT) Scanners, a pathbreaking innovation in medical technology. The main findings are that patents weighted by citations are highly correlated with the value of innovations, and that important innovations generate further innovative activity (R&D), and hence bring about down-the-line patents.

Suggested Citation

Trajtenberg, Manuel, Patents, Citations and Innovations: Tracing the Links (December 1987). NBER Working Paper No. w2457, Available at SSRN: https://ssrn.com/abstract=233719

Manuel Trajtenberg (Contact Author)

Tel Aviv University - Eitan Berglas School of Economics ( email )

P.O. Box 39040
Ramat Aviv, Tel Aviv, 69978
Israel
+972 3640 9911 (Phone)
+972 3640 9908 (Fax)

Centre for Economic Policy Research (CEPR)

London
United Kingdom

National Bureau of Economic Research (NBER)

1050 Massachusetts Avenue
Cambridge, MA 02138
United States

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