European empires had two key economic aspects: the extraction of colonial wealth by colonizers, and the relevance of trade for the colonial economies. I build a simple model of decolonization that puts these two elements at centre stage. By controlling policy in the colony, the mother country...

This paper reviews the economics approach to conflict and national borders. The paper (a) provides a summary of ideas and concepts from the economics literature on the size of nations; (b) illustrates them within a simple analytical framework where populations fight over borders and resources,...

This paper investigates the determinants of the different forms taken by regional integration in different parts of the world. This raises the issue of the relationship between economic and political integration. The theoretical model shows that, in an insecure world, the interplays between...

This is Part 2 of a two-part paper which surveys the historical evidence on the role of institutions in economic growth. The paper provides a critical scrutiny of a number of stylized facts widely accepted in the growth literature. It shows that private-order institutions have not historically...

This is Part 1 of a two-part paper which surveys the historical evidence on the role of institutions in economic growth. The paper provides a critical scrutiny of a number of stylized facts widely accepted in the growth literature. It shows that private-order institutions have not historically...

We examine the evolution of market potential and its role in driving economic growth over the long twentieth century. Theoretically, we exploit a structural gravity model to derive a closed-form solution for a widely-used measure of market potential. We are thus able to express market potential...

What has driven trade booms and trade busts in the past and present? We derive a micro-founded measure of trade frictions from leading trade theories and use it to gauge the importance of bilateral trade costs in determining international trade flows. We construct a new balanced sample of...

Iceberg transport costs are one of the main ingredients of modern trade and economic geography models: transport costs are modelled by assuming that a fraction of the goods shipped “melts in transit”. In this paper, we investigate whether the iceberg assumption applies to the costs of...

This research advances the hypothesis and establishes empirically that interpersonal population diversity has contributed significantly to the emergence, prevalence, recurrence, and severity of intrasocietal conflicts. Exploiting an exogenous source of variations in population diversity across...

Contests between groups are plagued by intra-group externalities (free-riding). Yet, costless incentive schemes that entirely avoid free-riding within a group might not be desirable, neither individually nor socially. In contests among two groups, a relatively weak (i.e., small or unproductive)...