International audienceThis paper shows that urban geography matters to the effectiveness of place-based policies, using the French enterprise zone program as a case study. Whereas this program created more jobs in spatially integrated neighborhoods, its impact on local wages was only visible in the more isolated ones. In addition, a focus on the average impact of the program would lead to the conclusion that it mostly succeeded in displacing preexisting firms, but a lower level of spatial isolation was a clear determinant of the decision to create new firms from scratch
We build a dynamic model of migration where, in addition to standard relocation costs, workers face spatial frictions that decrease their ability to compete for distant job opportunities. We estimate the model on a matched employer–employee panel dataset describing labour market transitions within and between the 100 largest French cities. Our identification strategy is based on the premise that frictions affect the frequency of job transitions, while mobility costs impact the distribution of accepted wages. We find that: (1) controlling for spatial frictions reduces mobility cost estimates by one order of magnitude; (2) the urban wage premium is driven by better opportunities for local job-to-job transitions in larger cities; (3) migration reduces lifetime inequalities by providing insurance against unsatisfactory initial location draws; (4) labour mobility policies based on relocation subsidies are inefficient, unlike switching from nationwide to local minimum wages.
Les documents de travail ne reflètent pas la position du CREST et n'engagent que leurs auteurs. Working papers do not reflect the position of CREST but only the views of the authors.
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