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Related Experiment Video

Updated: Nov 9, 2025

Author Spotlight: Standardizing the Development of Amine-Based Silica Composites as CO2 Adsorbents for Direct Air Capture
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Focusing climate negotiations on a uniform common commitment can promote cooperation.

Klaus M Schmidt1,2,3, Axel Ockenfels4,5

  • 1Department of Economics, University of Munich, 80539 Munich, Germany; klaus.schmidt@lmu.de.

Proceedings of the National Academy of Sciences of the United States of America
|April 10, 2021
PubMed
Summary

Negotiating a uniform common commitment, like a minimum carbon price, significantly boosts international cooperation on climate change. This approach proves more effective than individual or tailored commitments, especially when enforced.

Keywords:
climate policycommon commitmentcooperationnegotiation designreciprocity

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Area of Science:

  • Environmental Economics
  • Game Theory
  • International Relations

Background:

  • International cooperation is crucial for addressing global challenges like climate change.
  • Existing agreements (Paris Agreement, Kyoto Protocol) have limitations in achieving ambitious cooperation.
  • A proposed solution involves shifting negotiation focus to uniform common commitments.

Purpose of the Study:

  • To provide experimental evidence for the effectiveness of uniform common commitments in international negotiations.
  • To compare the success of uniform common commitments against individual and tailored commitments.

Main Methods:

  • Game theoretical analysis.
  • Experiments with human subjects negotiating contributions to a public good.
  • Comparison of treatments with enforceable and self-enforcing agreements.

Main Results:

  • Negotiating a uniform common commitment leads to more ambitious cooperation than individual or tailored commitments.
  • This holds true for both enforceable and self-enforcing agreement scenarios.
  • Uniform common commitments are most effective when enforced.

Conclusions:

  • Uniform common commitments, such as a uniform minimum carbon price, are a superior strategy for fostering international cooperation.
  • Experimental evidence supports the theoretical conjecture that this approach enhances cooperation.
  • Enforcement mechanisms further amplify the benefits of uniform common commitments.