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The heterogeneous impact of market size on innovation: evidence from French firm-level exports

Philippe Aghion, Antonin Bergeaud, Matthieu Lequien and Marc J. Melitz


We analyze how demand conditions faced by a firm in its export markets affect its innovation decisions. We exploit exogenous firm-level export demand shocks and find that firms respond by patenting more; furthermore, this response is driven by the subset of initially more productive firms. The patent response arises two to five years after the shock, highlighting the time required to innovate. In contrast, the demand shock raises contemporaneous sales and employment for all firms regardless of their productivity. This skewed innovation response to common demand shocks arises naturally from a model of endogenous innovation and competition with firm heterogeneity.


14 May 2024


The Review of Economics and Statistics 106(3) , pp.608-626, 2024


DOI: 10.1162/rest_a_01199

https://direct.mit.edu/rest/article/106/3/608/111180/The-Heterogeneous-Impact-of-Market-Size-on

This Journal article is published under the centre's Growth programme.