I develop a spatial-equilibrium model to quantify the distributional impacts of international
trade in an economy with intranational trade and migration costs. Focusing on China, I find …

Because of scale effects, idea-based growth models imply that larger countries should be
much richer than smaller ones. New trade models share the same counterfactual feature. In …

We develop and apply a procedure to flexibly estimate intra-national border barriers and
intra-regional trade costs. Bilateral border barriers very significantly depress Canadian inter …

Agriculture in poor countries has low productivity, high employment, and negligible trade
flows relative to other sectors. These facts motivate a multisector, open-economy view of …

The effects of intra-regional, inter-regional and international frictions on the trade flows of
Canada's provinces are disentangled by gravity model techniques. Unexplained Trade …

Municipal mergers have become a worldwide phenomenon in the past few decades,
primarily advanced to exploit economies of scale. While most evaluations of municipal …

Proper measurement and aggregation of trade costs is of paramount importance for sound
academic and policy analysis of the determinants-particularly those of policy-of economic …

Does trade within a country affect welfare and productivity? What are the magnitude and
consequences of costs to such trade? To answer these questions, we exploit unique …

This paper assesses the costs of internal trade barriers and proposes policies to improve
internal trade. Estimates suggest that complete liberalization of internal trade in goods can …

In this article, Trevor Tombe explores the history of federal-provincial transfers in Canada.
He compiles and analyzes uniquely detailed data from Confederation to the present …