The US Corporate Average Fuel Economy (CAFE) regulation mandates, subject to a civil penalty, producers to achieve a certain fleet average fuel economy on sales of new passenger cars. Analysing the incentive effects of CAFE, we find that it affords differential tax treatment to car models with...

We investigate the Hartwick rule for saving of a nation necessary to sustain a constant level of private consumption for a small open economy with an exhaustible stock of natural resources. The amount by which a country saves and invests less than the marginal resource rents equals the expected...

Many resource-rich countries have poor economic performance and suffer from negative genuine saving rates, especially if they have many rival factions and badly functioning legal systems. We attempt to shed light on these stylized facts by analyzing a power struggle about the control of natural...

What should be the West's top priority for climate-change policy? This article is a revised and updated version of my talk to the Potsdam Global Sustainability Symposium (which drafted the Potsdam Declaration presented to the 2007 UN Climate Change Conference in Bali).

We establish a theoretical as well as empirical framework to assess the role of resource endowments and their geographic location for inter-State conflict. The main predictions of the theory are that conflict tends to be more likely when at least one country has natural resources; when the...

We investigate the effect of natural resources on whether ethno-political groups choose to pursue their goals with peaceful as compared to violent means, distinguishing terrorism from insurgencies. We hypothesize that organizations are more likely to resort to terrorism rather than rebellion in...

This paper studies empirically the impact of mining on conflicts in Africa. Using novel data, we combine geo-referenced information over the 1997-2010 period on the location and characteristics of violent events and mining extraction of 27 minerals. Working with a grid covering all African...

Using state-of-the-art methods, this study estimates and compares the effects of exogenous shocks to global oil production on seven major industrialized economies. The main findings are: (1) There is a fair degree of similarity in the real growth responses. An exogenous oil supply disruption...

This paper studies the incidence of civil war over time. We put forward a canonical model of civil war, which relates the incidence of conflict to circumstances, institutions and features of the underlying economy and polity. We use this model to derive testable predictions and to interpret the...

We present a theory of ethnic conflict in which coalitions formed along ethnic lines compete for the economy's resources. The role of ethnicity is to enforce coalition membership: in ethnically homogeneous societies members of the losing coalition can defect to the winners at low cost, and this...