NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

John J. Beggs

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NBER Working Papers and Publications

January 1991Male Immigrant Wage and Unemployment Experience in Australia
with Bruce Chapman
in Immigration, Trade, and the Labor Market, John M. Abowd and Richard B. Freeman, editors
1984Long-Run Trends in Patenting
in R&D, Patents, and Productivity, Zvi Griliches, editor
August 1982Long Run Trends in Patenting
w0952
This paper examines the patenting in the U.S. from its origins in 1790 up to 1980. The prime intent was to identify relationships between patenting and the rate of industrial development, and to further look for any regular cyclical patterns in the time series of patents themselves. To this end, detailed records were gathered on annual patenting, along with key descriptive data on industry structure for a sample of twenty industries for the period 1850 through 1940. In general the correlations between changes in the rate of patenting and changes in industry characteristics are small. A tentative conclusion is that the rate of change in patenting may move inversely with the rate of change in value added. This leads the author to speculate on a "defensive R&D hypothesis" which may reflect st...

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