Specialized knowledge-generating jobs comprise close to one fifth of employment and one fourth of the wage bill in French manufacturing firms. They are positioned high in the firm hierarchy, horizontally aside upper-tier managers but are not managerial in nature. This escapes the patterns...

This paper shows the importance of technological synergies among heterogeneous firms for aggregate fluctuations. First, we document six novel empirical facts using microdata that suggest the existence of important technological synergies between trading firms, the presence of positive...