Striking evidence is presented of a previously unremarked transformation of urban structure from mainly sectoral to mainly functional specialization. We offer an explanation showing that this transformation is inextricably interrelated with changes in firms' organization. A greater variety of...

This paper summarized some new evidence concerning the impact of collective bargaining on productivity for workers of a given quality working with the same amount of capital. The new findings, which are based on econometric investigations, indicate that in many sectors,in particular...