Results

Journal article

Quarterly Journal of Economics:

Quantifying the gap between equilibrium and optimum under monopolistic competition

Equilibria and optima generally differ in imperfectly competitive markets. Although this is well understood theoretically, it is unclear how large the welfare distortions are in the aggregate economy. Do they matter quan...Read more...

CEP discussion paper

Prime locations

We harness big data to detect prime locations - large clusters of knowledge-based tradable services - in 125 global cities and track changes in the within-city geography of prime service jobs over a century. Historically...Read more...

Journal article

Journal of Urban Economics:

Spatial frictions

The world is replete with spatial frictions. Shipping goods across cities entails trade frictions. Commuting within cities causes urban frictions. How important are these frictions in shaping the spatial economy? We deve...Read more...

CEP discussion paper

Distorted monopolistic competition

We characterize the equilibrium and optimal resource allocations in a general equilibrium model of monopolistic competition with multiple asymmetric sectors and heterogeneous firms. We first derive general results for ad...Read more...

CEP discussion paper

Spatial Frictions

The world is replete with spatial frictions. Shipping goods across cities entails trade frictions. Commuting within cities causes urban frictions. How important are these frictions in shaping the spatial economy? We deve...Read more...

CEP discussion paper

Trade Crisis? What Trade Crisis?

We provide an analysis of the 2008-2009 trade collapse using microdata from a small open economy, Belgium. First, we find that changes in firm-country-product exports and imports occurred mostly at the intensive margin: ...Read more...

SERC/Urban and Spatial Programme Discussion Paper

Trade, Wages and Productivity

We develop a new general equilibrium model of monopolistic competition with heterogeneous firms, variable demand elasticity and multiple asymmetric regions, in which trade integration induces wage and productivity change...Read more...

CEP discussion paper

Trade, Wages and Productivity

We develop a new general equilibrium model of monopolistic competition with heterogeneous firms, variable demand elasticity and multiple asymmetric regions, in which trade integration induces wage and productivity change...Read more...

SERC/Urban and Spatial Programme Discussion Paper

Survival of the Fittest in Cities: Agglomeration, Selection and Polarisation

Empirical studies consistently report that labour productivity and TFP rise with city size. The reason is that cities attract the most productive agents, select the best of them, and make the selected ones even more prod...Read more...

CEP discussion paper

Survival of the Fittest in Cities: Agglomeration, Selection, and Polarisation

Empirical studies consistently report that labour productivity and TFP rise with city size. The reason is that cities attract the most productive agents, select the best of them, and make the selected ones even more prod...Read more...