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DOI: 10.1080/00420980500185389 © 2005 Urban Studies Journal Limited Growth in Commuting Distances in French Polycentric Metropolitan Areas: Paris, Lyon and MarseilleLVMT, 19 rue Alfred Nobel Cité Descartes, Champs sur Mame, F-77455 Marne la Vallée Cedex 2, France, aguilera{at}inrets.fr It has frequently been suggested in the literature that a polycentric distribution of employment and people shortens commuting distances because people locate within or close to their employment sub-centre (the co-location hypothesis). Having studied the three biggest French metropolitan areas over the past decade it has been established that co-location affects only a minority of inhabitants, of whom there are fewer in 1999 than there were nine years earlier. Indeed, the majority of people living in a sub-centre work outside their sub-centre of residence. This situation was even more marked in 1999 than it was in 1990. In addition to this, the majority of jobs located in sub-centres are held by non-residents who are generally living further and further from their place of work.
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