NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

The Rate of Obsolescence of Patents, Research Gestation Lags, and the Private Rate of Return to Research Resources

Ariel Pakes, Mark Schankerman

Chapter in NBER book R&D, Patents, and Productivity (1984), Zvi Griliches, editor (p. 73 - 88)
Published in 1984 by University of Chicago Press
© 1984 by the National Bureau of Economic Research

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This chapter first appeared as NBER working paper w0346, The Rate of Obsolescence Of Knowledge, Research Gestation Lags, and the Private Rate of Return to Research Resources, Ariel Pakes, Mark Schankerman
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