Les Echos:
Les nouveaux mysteres de la productivite/The new mysteries of productivity
10 January 2018
But these explanations are not enough. Economists therefore questioned the measure. And if productivity gains were too new to be detected by traditional statistical tools? In the United States, for example, the states with the highest patent densities are those with the lowest productivity gains. Economist Philippe Aghion, a professor at the Collège de France, published works estimating "missing growth" in several countries.