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

Supplier search and re-matching in global sourcing: theory and evidence from China

In this paper, we consider a dynamic search-and-matching problem of a firm with its intermediate input supplier. In our model, a headquarter currently matched with a supplier, has an interest to find and collaborate with...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...

Journal article

Journal of International Economics:

Relational contracts and supplier turnover in the global economy

Headquarters and their specialized component suppliers have a vital interest in establishing long-term collaborations. When formal contracts are not enforceable, such efficiency-enhancing cooperations can be established ...Read more...

CEP discussion paper

Relational contracts and supplier turnover in the global economy

Headquarters and their specialized component suppliers have a vital interest in establishing long-term collaborations. When formal contracts are not enforceable, such efficiency enhancing cooperations can be established ...Read more...

SERC/Urban and Spatial Programme Discussion Paper

The Size Distribution Across All 'Cities': A Unifying Approach

Older cities in the US tend to be larger than younger ones. The distribution of city sizes is, therefore, systematically related to the country's city age distribution. We introduce endogenous city creation into a dynami...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...

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...