We study optimal climate policy in a global economy where regions differ in wealth and climate vulnerability. Carbon emissions from production lead to output losses, and there is a technology for emissions absorption. We provide an aggregation result: the model with heterogeneity can be cast...

In 2021, Germany adjusted its vehicle taxation scheme, resulting in a disproportionate increase in the tax burden for vehicles with high carbon emission intensity. This article presents empirical evidence on the impact of Germany's vehicle taxation and its reforms on automobile emissions. To...