Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
Big cities specialize in services rather than manufacturing. Big-city establishments in services are larger than the national average, whereas those in manufacturing are smaller. We propose an explanation of these and other related facts. The theory is developed in an economic geography model that is an alternative to the standard Dixit--Stiglitz structure. In our tractable structure, which has potentially wider application, firms have monopoly power in local markets but are price takers in export markets. Copyright 2004, Oxford University Press.