Stronger protection or technological revolution
Subtitle: what is behind the recent surge in patenting?
By: Samuel Kortum, Josh Lerner.
Contributors: Lerner, Joshua.; National Bureau of Economic Research.
Series: NBER working paper series -- working paper 6204; Working paper series (National Bureau of Economic Research) -- working paper 6204.
Publisher: National Bureau of Economic Research
Published: 1997
Place of publication: Cambridge, MA
Language: eng
Number of pages: 57
Subjects: Patents -- United States -- Econometric models.; Research -- United States -- Econometric models.
Notes: "September 1997."

JEL no. O30, O32, O34.

Includes bibliographical references (p. 40-47).

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Electronic version available via the Internet at the NBER World Wide Web site.

Financial support from the National Science Foundation