Estimating Agglomeration Economies with History, Geology, and Worker Effects
47 Pages Posted: 10 Jun 2008
Date Written: February 1, 2008
Abstract
Does productivity increase with density? We revisit the issue using French wage and TFP data. To deal with the 'endogenous quantity of labour' bias (i.e., urban agglomeration is consequence of high local productivity rather than a cause), we take an instrumental variable approach and introduce a new set of geological instruments in addition to standard historical instruments. To deal with the 'endogenous quality of labour' bias (i.e., cities attract skilled workers so that the effects of skills and urban agglomeration are confounded), we take a worker fixed-effect approach with wage data. We find modest evidence about the endogenous quantity of labour bias and both sets of instruments give a similar answer. We find that the endogenous quality of labour bias is quantitatively more important.
Keywords: agglomeration economies, instrumental variables, TFP, wages
JEL Classification: R12, R23
Suggested Citation: Suggested Citation
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