This paper investigates the extent to which the gap in total factor productivity between small and large firms is due to differences in the endowment of factors determining productivity and to the returns associated with these factors. We place particular emphasis on the contribution of...

pt. 1. Regional innovation systems, agglomeration economies and knowledge spillovers : theoretical approaches -- pt. 2. Regional innovation systems, agglomeration economies and knowledge spillovers : empirical studies -- pt. 3. Regional economic growth and knowledge.

This paper studies the impact of robot adoption on firms' global sourcing activities. Using a rich panel dataset of Spanish manufacturing firms, we show that robot adopting firms increased their intermediate input purchases from foreign and domestic suppliers between 2006 and 2016. The effects...