Allocation of free emissions allowances may distort firms' incentives or have adverse distributional effects. Nevertheless, Böhringer and Lange (2005) show that in a closed emissions trading scheme with a fixed number of firms, a first-best outcome can be achieved if the base year for...

Emission trading schemes where allocations are based on updated baseline emissions give firms less incentives to reduce emissions. Nevertheless, according to Böhringer and Lange (2005a), such allocation schemes are cost-effective if the system is closed and allocation rules are equal across...