from Part I - Innovation Policy and Innovation Systems
Published online by Cambridge University Press: 10 August 2018
In the various theories of endogenous or semi-endogenous growth, it is argued that R&D drives productivity growth through increased choice or quality improvements in intermediate inputs or final goods (Grossman and Helpman, 1991; Aghion and Howitt, 1998; Barro and Sala-i-Martin, 2004). Private rates of return to R&D have been estimated to be in the 20 to 30 per cent range (see Hall, Mairesse and Mohnen [2010] for a survey). Ugur, Trushin, Solomon and Guidi (2016), in their meta-analysis of the empirical literature, conclude that the returns are very heterogeneous, maybe lower than the range reported by Hall et al. (2010), but still positive.
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