Duranton, GillesJayet, Hubert2023-05-232023-05-232011-01-012016-06-02https://repository.upenn.edu/handle/20.500.14332/45700This paper provides supportive evidence to the notion that the division of labour is limited by the extent of the (local) market. We first propose a theoretical model. Its main prediction is that scarce specialists occupations are over-represented in large cities. Using census data for French cities, we find strong empirical support for this prediction.© 2011. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.division of labourspecialisationextent of the marketReal EstateArticle