150 Years of American Invention: Methodology and a First Geographical Application

Wellesley College Working Paper 99-01

Posted: 27 Jan 1999

See all articles by Daniel K. N. Johnson

Daniel K. N. Johnson

Colorado College - Department of Economics and Business

Date Written: January 1999

Abstract

This paper makes use of American patent data to shed light on the geographical history of invention, and introduces a methodology (the Wellesley Technology Concordance) which creates matrices describing the distribution of patents by 43 industries of manufacture and 50 sectors of use, along with all intersectoral interactions. National data (1840-1996) are presented and summarized, along with state-level totals (1883-1996). A simple constant market share analysis demonstrates the usefulness of the WTC methodology in the exploration of regional differences over time, illuminating the links between the continued success of key sectors and the emergence or submergence of geographic regions as leading inventors.

JEL Classification: C67, C81, O31, N51, N52, N61, N62, N71, N72

Suggested Citation

Johnson, Daniel Kent Neil, 150 Years of American Invention: Methodology and a First Geographical Application (January 1999). Wellesley College Working Paper 99-01. Available at SSRN: https://ssrn.com/abstract=146950

Daniel Kent Neil Johnson (Contact Author)

Colorado College - Department of Economics and Business ( email )

14 E Cache La Poudre Street
Colorado Springs, CO 80903
United States
719-389-6654 (Phone)
719-389-6927 (Fax)

HOME PAGE: http://faculty1.coloradocollege.edu/~djohnson

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