The analysis in this paper shows that unpredictable variations in economic productivity may have a positive or negative effect on the average growth rate of output. This theoretical ambiguity result is not solely determined by the value of the elasticity of intertemporal substitution (of...

This paper reviews the emergence and evolution of major topics in economics of innovation. Throughout the paper, particular attention is devoted to the analysis of the cumulative aspects and complementarities between di_erent paths of research over time. Moreover, this survey highlights the...