Innovation, reallocation and growth

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Title: Innovation, reallocation and growth
Author: Acemoglu, Daron ; Akcigit, Ufuk ; Bloom, Nicholas ; Kerr, William
Organization: Bank of Finland
Series: Bank of Finland Research Discussion Papers
Series number: 22/2013
Year of publication: 2013
Publication date: 25.9.2013
Pages: 51 s.
Subject (yso): innovaatiot; yritykset; tuottavuus; patentit
Keywords: mallit; R&D; Yhdysvallat;
JEL: O31; O32; O33
Abstract: We build a model of firm-level innovation, productivity growth and reallocation featuring endogenous entry and exit. A key feature is the selection between high- and low-type firms, which differ in terms of their innovative capacity. We estimate the parameters of the model using detailed US Census micro data on firm-level output, R&D and patenting. The model provides a good t to the dynamics of firm entry and exit, output and R&D, and its implied elasticities are in the ballpark of a range of micro estimates. We find industrial policy subsidizing either the R&D or the continued operation of incumbents reduces growth and welfare. For example, a subsidy to incumbent R&D equivalent to 5% of GDP reduces welfare by about 1.5% because it deters entry of new high-type rms. On the contrary, substantial improvements (of the order of 5% improvement in welfare) are possible if the continued operation of incumbents is taxed while at the same time R&D by incumbents and new entrants is subsidized. This is because of a strong selection effect: R&D resources (skilled labor) are inefficiently used by low-type incumbent firms. Subsidies to incumbents encourage the survival and expansion of these firms at the expense of potential high-type entrants. We show that optimal policy encourages the exit of low-type firms and supports R&D by high-type incumbents and entry. JEL No. E2, L1, O31, O32 and O33 Keywords: entry, growth, industrial policy, innovation, R&D, reallocation, selection.

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