Economic activities are highly clustered. Why is geographic concentration becoming a predominant feature of modern economies? On the basis of the empirical models developed by the 'new' theories of international trade, our answer is that increasing returns are the driving force of economic...

Urban areas have particular sensitivities to climate change, and therefore adaptation to a warming planet represents a challenging new issue for urban policy makers in both the developed and developing world. Further to climate mitigation strategies implemented in various cities over the past 20...

"Human capital-based theories of cities suggest that large, economically diverse urban agglomerations increase worker productivity by increasing the rate at which individuals acquire skills. One largely unexplored implication of this theory is that workers in big cities should see faster growth...

"One of the most robust findings emerging from studies of industrial agglomeration is the rise in productivity that tends to accompany it. What most studies have not addressed, however, is the potential role played by human capital externalities in driving this relationship. This paper seeks to...

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...