Creativity is often highly concentrated in time and space, and across different domains. What explains the formation and decay of clusters of creativity? We match data on notable individuals born in Europe between the XIth and the XIXth century with historical city data. The production and...

Voluntary participation can improve multilateral environmental governance. We develop a theory of voluntary participation in federal environmental policy by states of differing wealth. Using a general equilibrium model, we formalize voluntary participation by a Pareto-improving federal emission...

Mitigating climate change is a global public good to which many different countries contribute. The incentive of each country to contribute through the provision of effective climate policies depends on other countries’ contributions. Climate policy risk spillovers arise when expected changes...