Diewert, Walter E. (contributor) - 2005
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However, once a new successful technology has been created, expiry of patents, diffusion
of knowledge about the innovation … the private revenues accruing to industrially produced knowledge. However, except for
the two studies by Pakes and … Shankerman (1978) (1986), there are few estimates for the rate of decay of
knowledge capital. Pakes and Shankerman correctly …