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...

We use Danish firm-level data to examine the causal link between carbon emissions, offshoring, and import competition. Offshoring reduces firms' emission intensity but increases their production. Import competition reduces firms' production without affecting their emission intensity. For...