Jonathan Koomey, Karl Hausker, Zachary Schmidt, Dan Lashof

Abandon the idea of an “optimal economic path” for climate policy

  • Atmospheric Science
  • Geography, Planning and Development
  • Global and Planetary Change
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AbstractMany economic modelers believe that there is an “optimal economic path” for solving the climate problem that exists independent of human choices. This belief rests on the notion that Integrated Assessment Models can determine the path that “maximizes global welfare” and, in turn, this path should drive climate policy. This commentary focuses on an under‐appreciated problem with that belief. We argue that the existence of pervasive increasing returns to scale, network externalities, learning curves, spillovers, and other nonlinear effects puts the idea of a single optimal economic path at odds with our current understanding of the most important forces driving the development of real economic and technological systems. We further argue that this idea is detrimental to rigorous understanding of climate solutions.This article is categorized under: Assessing Impacts of Climate Change > Scenario Development and Application Climate Economics > Economics and Climate Change Climate Economics > Economics of Mitigation

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