Résultats de recherche
Creator: Luttmer, Erzo G. J. Series: Working paper (Federal Reserve Bank of Minneapolis. Research Department) Number: 699 Abstract:
This paper adds imitation by incumbent firms, and not just by new entrants, to the model of selection and growth developed in Luttmer . Noisy firm-level innovation and imitation give rise to a long-run growth rate that exceeds the average rate at which individual firms innovate. It can be shown, in simple examples, that the economy converges to a long-run balanced growth path from compactly supported initial productivity distributions. The right tail of the stationary distribution of de-trended productivity is approximately Pareto. The tail index of this distribution depends on the rate at which incumbents are able to imitate only indirectly, through general equilibrium effects of this parameter on the equilibrium growth rate.
Mot-clé: Endogenous growth, Technology diffusion, and Size distribution of firms Assujettir: O33 - Technological Change: Choices and Consequences; Diffusion Processes and L11 - Production, Pricing, and Market Structure; Size Distribution of Firms
Creator: Atkeson, Andrew, Burstein, Ariel, and Chatzikonstantinou, Manolis Series: Staff report (Federal Reserve Bank of Minneapolis. Research Department) Number: 573 Abstract:
What quantitative lessons can we learn from models of endogenous technical change through innovative investments by firms for the impact of changes in the economic environment on the dynamics of aggregate productivity in the short, medium, and long run? We present a unifying model that nests a number of canonical models in the literature and characterize their positive implications for the transitional dynamics of aggregate productivity and their welfare implications in terms of two sufficient statistics. We review the current state of measurement of these two sufficient statistics and discuss the range of positive and normative quantitative implications of our model for a wide array of counterfactual experiments, including the link between a decline in the entry rate of new firms and a slowdown in the growth of aggregate productivity given that measurement. We conclude with a summary of the lessons learned from our analysis to help direct future research aimed at building models of endogenous productivity growth useful for quantitative analysis.
Mot-clé: Endogenous growth, Transitional dynamics, and Innovative investment Assujettir: O30 - Innovation; Research and Development; Technological Change; Intellectual Property Rights: General and O40 - Economic Growth and Aggregate Productivity: General