We study the effect of leadership in an experimental threshold public "bad" game, where we manipulate both the relative returns of two investments (the more productive of which causes a negative externality) and the extent to which the gains from leadership diffuse to the group. The game...

Achieving the Paris Agreement long-term temperature goal requires closing the ambition and action gap. G20 countries have a crucial role to play in realising increased climate policy ambition. Synthetic electro fuels (e-fuels) were identified as one of the key policy areas and promising options...

Containing the COVID-19 pandemic will confer global benefits that greatly exceed the costs, but effective solutions require the redistribution of vaccines, technology, and other scarce resources from high-income to low-income countries. The United States has played a central role in coordinating...

Multilateral cooperation initiatives (or “climate clubs”) can generate some of the additional action that is needed to achieve the goals agreed in the Paris Agreement. An analysis of the state of collaboration in the four policy areas energy transition, synthetic fuels, food systems and...