Following high-profile United Nations climate summits in Glasgow and Paris, sub-national regions and cities are increasingly seeking to set climate targets and policies in line with the Paris Agreement's goals. Downscaled carbon budgets are a useful framework for setting local mitigation targets...

We develop the concept of aggregate emission targets, which are goals for national emissions but do not dictate the forms of regulation used to achieve the goals. We compare aggregate emission intensity, quantity, and price targets adopted at the national level but implemented cost effectively...