The rate of obsolescence of patents, research gestation lags, and the private rate of return to research resources

Pakes, Ariel; and Schankerman, MarkORCID logo (1987) The rate of obsolescence of patents, research gestation lags, and the private rate of return to research resources In: R&d, Patents and Productivity. University of Chicago Press, Chicago, IL., USA, pp. 73-88. ISBN 9780226308845
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