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

Ariel Pakes & Mark Schankerman

Published Date January 1984

Copyright 1984

ISBN 0226308847

Book: R&D, Patents, and Productivity

Book editor: Zvi Griliches

PUBLISHER: University of Chicago Press

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Ariel Pakes and Mark Schankerman, R&D, Patents, and Productivity (University of Chicago Press, 1984), chap. 4, https://www.nber.org/books-and-chapters/rd-patents-and-productivity/rate-obsolescence-patents-research-gestation-lags-and-private-rate-return-research-resources.