This handbook chapter studies the theoretical micro-foundations of urban agglomeration economies. We distinguish three … precise characterisation of some of the main theoretical underpinnings of urban agglomeration economies, to discuss modelling … issues that arise when working with these tools, and to compare different sources of agglomeration economies in terms of the …

This review discusses frontier topics in economic geography as they relate to firms and agglomeration economies. We … the vast scope for enhancements of our picture of agglomeration with the new data that are emerging …

This paper studies the sources of agglomeration economies in cities. We begin by introducing a simple dynamic spatial … large, though there can be exceptions. Thus, dynamic agglomeration appears to be driven by cross-industry effects. Once we … control for these cross-industry agglomeration effects, we find a strong negative relationship between city size and city …

presence of demand externalities that arise from spatial agglomeration as a possible explanation, but empirically identifying … this type of spillovers has proven difficult. We test for the presence of agglomeration spillovers in Milan's restaurant … after the reform. Consistent with the existence of significant agglomeration externalities, we find that after 2005, the …

international trade and economic geography. We build a model with agglomeration economies where firms with heterogeneous … locate in larger cities and profit from agglomeration effects; (ii) conversely, while opening up to trade has complex overall …

We provide new theory and evidence on the role of consumption access in understanding the agglomeration of economic …

This paper proposes a simple theory of a system of cities that decomposes the determinants of the city size … larger cities, but also to greater frictions through congestion and other negative effects of agglomeration. Using data on …

interpreted as evidence for the existence of agglomeration economies. This correlation is particularly strong in cities with …

existence of agglomeration economies, which exist when productivity rises with density, but estimating the magnitude of those … in speeding the flow of ideas. Finally, urban economics has some insights to offer related topics such as growth theory …