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Is Innovation Persistent At the Firm Level: An Econometric Examination Comparing the Propensity Score and Regression Methods
At the macroeconomic level, the persistence of technological change allows sustainable growth. The authors analyze whether or not the innovations come from the same set of firms or from a continous renewal of innovators.
Link
ftp://mse.univ-paris1.fr/pub/mse/cahiers2004/V04075.pdf