Learning from Nationally Determined Contributions. Joseph Aldy, April 2018, Paper, “National governments have submitted emissions mitigation pledges under the Paris Agreement that vary considerably in form, level of required emissions mitigation, elaboration of nonemissions goals, and implementation strategies. As a result, domestic emissions mitigation programs necessary to deliver on the Paris pledges will diverge in the degree to which that mitigation will be achieved at least cost. This paper explores both what we learn from how nationally determined contributions (NDCs) diverge from least-cost policies and the implications for comparing mitigation efforts.Link