Why do cities differ so much in productivity? We document that most of the measured dispersion in productivity across … US cities is spurious and reflects granularity bias: idiosyncratic heterogeneity in plant-level productivity and size …

/EU productivity gap. We find robust evidence that US firms have a higher capacity to translate R&D into productivity gains (especially … in the high-tech industries), and this contributes to explaining the higher productivity of US firms. Conversely, EU … firms are more likely to achieve productivity gains through capital-embodied technological change at least in medium and low …