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Related Experiment Videos

Self-enforcing climate-change treaties.

Prajit K Dutta1, Roy Radner

  • 1Department of Economics, Columbia University, 1126 International Affairs Building, 420 West 118th Street, New York, NY 10027, USA.

Proceedings of the National Academy of Sciences of the United States of America
|March 31, 2004
PubMed
Summary

A self-enforcing international treaty on greenhouse gas emissions is crucial for global cooperation. This study models such treaties as Nash equilibria, finding potential for Pareto-superior outcomes beyond the current "business as usual" scenario.

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Dynamic pricing of network goods with boundedly rational consumers.

Proceedings of the National Academy of Sciences of the United States of America·2013
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Area of Science:

  • Environmental economics
  • Game theory
  • International relations

Background:

  • Effective international agreements for greenhouse gas emission control are challenging without a world government.
  • The Kyoto Protocol's limitations highlight the need for self-enforcing treaty mechanisms.
  • Self-enforcing treaties ensure individual country participation is in their own best interest if others comply.

Purpose of the Study:

  • To model and analyze self-enforcing treaties for greenhouse gas emissions control.
  • To explore the concept of Nash equilibria in dynamic games involving sovereign nations.
  • To identify and compare Pareto-superior equilibria to the current 'business as usual' scenario.

Main Methods:

  • Modeling a dynamic game among 184 sovereign countries with diverse economic capabilities.

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  • Characterizing multiple Nash equilibria and global-Pareto-optimal solutions.
  • Calibrating a model to provide numerical illustrations of different emission trajectories.

    • Main Results:

    • Identified 'business as usual' as one of multiple possible equilibria.
    • Demonstrated the existence of Pareto-superior equilibria achievable through self-enforcing treaties.
    • Quantified potential welfare gains from transitioning to more efficient equilibria.

    Conclusions:

    • Self-enforcing treaties offer a viable framework for international climate cooperation.
    • The multiplicity of equilibria presents opportunities to improve upon the current inefficient 'business as usual' path.
    • Transitioning to Pareto-superior equilibria can yield significant global welfare benefits.