The paper derives the optimal carbon tax in closed-form from an integrated assessment of climate change. The formula shows how carbon, temperature, and economic dynamics quantify the optimal mitigation effort. The model's descriptive power is comparable to numeric models used in policy advising....

We introduce a "smart" cap and trade system that eliminates the welfare costs of asymmetric information (“uncertainty”). This cap responds endogenously to technology or macroeconomic shocks, relying on the market price of certificates to aggregate information. It allows policy makers to...

Am 20. September hat die Bundesregierung die Einführung eines nationalen CO2 -Preises beschlossen. Sie hat sich dabei für eine Preisregulierung entschieden, die ab dem Jahr 2026 weitgehend durch eine Mengenregulierung ersetzt wird. Der vorliegende Artikel schlägt vor, Preis- und Mengenziel...

"Prices versus quantities" (Weitzman 1974), a hugely influential paper, is widely cited (and taught) in current debates about the best policy to reduce greenhouse gas emissions. The paper's criterion for ranking policies suggests that technological uncertainty favors taxes over cap and trade....

Over the last few decades, integrated assessment models (IAM) have provided insight into the relationship between climate change, economy, and climate policies. The limitations of these models in capturing uncertainty in climate parameters, heterogeneity in damages and policies, have given rise...

The ongoing debate concerning the ranking of taxes versus cap and trade for climate policy begins with \ps{Weitzman74} seminal slope-based criterion and concludes that taxes dominate quotas. We challenge this conclusion and the intuition behind it. Because technology shocks and pollution stocks...