The Henry George Theorem (HGT) states that, in first-best economies, the fiscal surplus of a city government that finances the Pigouvian subsidies for agglomeration externalities and the costs of local public goods by a 100% tax on land is zero at optimal city sizes. We extend the HGT to...

Many sources of urban agglomeration involve departures from the first-best world. The benefit evaluation of a transportation project must then take into account agglomeration benefits along with any direct user benefits. Using a monopolistic competition model of differentiated intermediate...

We generalize the formulae for welfare changes by Arkolakis, Costinot, and Rodríguez-Clare (2012) and Melitz and Redding (2014a) to allow for various cardinalizations of the subutility functions for varieties. Despite the same macro restrictions and the same equilibrium allocations, our new...

Many sources of urban agglomeration involve departures from the first-best world. By modeling the microstructure of agglomeration economies, we derive second-best benefit evaluation formulae for urban transportation improvements. Previous work has investigated the same problem, but without...

Many sources of urban agglomeration, such as the gains from variety, bette rmatching, and knowledge creation and diffusion, involve departures from the first-best world. Benefit evaluation of a transportation project must then take into account changes in excess burden along with any direct user...

Modeling a micro-structure of agglomeration economies, this article derives a second-best benefit evaluation formula for urban transportation improvements. Without explicitly modeling the sources of agglomeration economies, Venables (JTEP 2007) investigated the same problem. This article...

In this monograph several aspects of externalities in cities are analyzed using extensions of a standard residential land use model. Topics covered are optimal and market city sizes, local public goods, traffic congestion, externalities between different types of households, and the growth of a...