This paper studies the effect of innovation uncertainty on the concomitant time path of firm valuations, technology adoption and growth in a setting which incorporates positive network externalities. The resulting stock market bubble, induced by uncertainty and accelerated by the externality...

This paper presents the first empirical test with German firm level data of a hypothesis derived by Bustos (AER 2011) in a model that explains the decision of heterogeneous firms to export and to engage in R&D. Using a non-parametric test for first order stochastic dominance it is shown that, in...

There has been a concomitant rise in R&D and the rate of economic growth in emerging countries. Analyzing a panel of 31 emerging countries, we find convincing evidence of scale effects which make government policies potent for long-run growth. This contrasts sharply with the well known findings...