We review the theoretical links between growth and agglomeration. Growth, in the form of innovation, can be at the origin of catastrophic spatial agglomeration in a cumulative process la Myrdal. One of the surprising features of the Krugman [Journal of Political Economy 99 (1991) 483499] model,...

The question of the spatial impacts of the Information and Communication Technology (ICT) has animated the intellectual and policy debate for a long time. At the beginning of the 1990s the rise of the Internet brought a new surge of debate: it was argued that the Internet would free the economy...