Cities increasingly address climate change, e.g. by pledging city-level emission reduction targets. This is puzzling for the provision of a global public good: what are city governments' reasons for doing so, and do pledges actually translate into emission reductions? Empirical studies have...

The paper considersan industry where the effects of pollution can be off-set by investing in adaption as a private good. The focus is not on external effects, but on economies of scale that are introducted when the costs of adapting to pollution are independent from the quantity produced. The...