This paper evaluates, in the context of economic geography estimates, the magnitude of the distortions arising from the choice of zoning system, which is also known as the Modifiable Areal Unit Problem (MAUP). We consider three standard economic geography exercises (the analysis of spatial...

This paper presents empirical tests of the hypothesis that firms cluster geographically due to Marshallian localization economies. The hypothesis implies that changes in employment in localized industries should be more closely related within the regions than across regions. We develop an...

The striking geographical concentration of economic activities suggests that there are substantial benefits to agglomeration. The nature of those benefits remains unclear, however. In this Paper we take advantage of a new dataset to quantify the role of one of the main contenders: the matching...

Measures of urban productivity are typically positively associated with city population. But is this relationship causal? We discuss the main sources of bias in the proper identification of agglomeration effects. We also assess a variety of solutions that have been proposed in the literature to...

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...

We propose an integrated framework to discuss the empirical literature on the local determinants of agglomeration effects. We start by presenting the theoretical mechanisms that ground individual and aggregate empirical specifications. We gradually introduce static effects, dynamic effects, and...

This paper provides descriptive evidence about the distribution of wages and skills in denser and less dense employment areas in France. We confirm that on average, workers in denser areas are more skilled. There is also strong overrepresentation of workers with particularly high and low skills...

We evaluate the role that cities play on individual productivity in China. First, we show that location explains a large share of nominal wage disparities. Second, even after controlling for individual and firms characteristics and instrumenting city characteristics, the estimated elasticity of...

There are large spatial disparities in unemployment durations across the 1,300 municipalities in the Paris region (Ile-de-France). In order to characterize these imbalances, we estimate a proportional hazard model stratified by municipality on an exhaustive dataset of all unemployment spells...

This paper investigates how in addition to personal characteristics the neighbourhood affects the individual transition rate from welfare to work. We use a unique administrative database on welfare recipients in Rotterdam, the second largest city of The Netherlands. We find that the exit rate to...