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 considers the consequences of a two-sector vertically-integrated model of firms producing output using firm-specific capital with a second sector producing firm-specific capital by adapting raw capital purchased in the market. Analysts rarely observe each sector separately....