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Affective Polarization, Media Outlets, and Opinion Dynamics

Author

Listed:
  • Della Lena, Sebastiano

    (Monash University)

  • Merlino, Luca

    (ECARES, Universite libre de Bruxelles)

  • Zenou, Yves

    (Monash University)

Abstract

We study opinion dynamics in a social network consisting of two groups. Agents update their opinions by conforming to members of their own group while rejecting the views of the opposing group (affective polarization), and by listening to a media outlet that may provide biased information. We characterize the long-run opinions and identify when affective polarization and media bias lead to ideological polarization, persistent disagreement, or failures of learning. We also derive when information interventions or censorship improve { the accuracy of average opinions} and reduce disagreement, and when they backfire: better information helps only under specific media bias configurations and when directed to the agents we identify as most effective at propagating it through the network.

Suggested Citation

  • Della Lena, Sebastiano & Merlino, Luca & Zenou, Yves, 2026. "Affective Polarization, Media Outlets, and Opinion Dynamics," IZA Discussion Papers 18823, IZA Network @ LISER.
    • Handle: RePEc:iza:izadps:dp18823
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    JEL classification:

    • C7 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory
    • D7 - Microeconomics - - Analysis of Collective Decision-Making
    • D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation

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