Without a comprehensive global climate agreement, carbon leakage remains a contentious issue. Consumption-based pricing of emissions—which could in practice be implemented with a full border tax adjustment (BTA)—has been forwarded as an option to increase the effectiveness of unilateral...

The implementation of mitigation policies will be complicated by several real-world imperfections ("second-best conditions") and constraints typically not included in the more idealized economies assumed in Integrated Assessment Models (IAMs), based on which such policies are derived. But which...