We provide empirical evidence on the role of labour market pooling in determining thespatial concentration of UK manufacturing establishments. This role arises because largeconcentrations of employment iron out idiosyncratic shocks and improve establishments'ability to adapt their employment to...

Firms are more productive on average in larger cities. Two explanations have been offered: agglomeration economies (larger cities promote interactions that increase productivity) and firm selection (larger cities toughen competition allowing only the most productive to survive). To distinguish...