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Media, Fake News, and Debunking

Author

Listed:
  • Ngo Van Long
  • Martin Richardson
  • Frank Stähler
Abstract
We construct a Hotelling-type model of two media providers, each of whom can issue fake and/or real news and each of whom can invest in the debunking of their rival’s fake news. The model assumes that consumers have an innate preference for one provider or the other and value real news. However, that valuation varies according to their bias favoring one provider or the other. We demonstrate a unique subgame perfect Nash equilibrium in which only one firm issues fake news and we show, in this setting, that increased polarization of consumers - represented by a wider distribution - increases the prevalence of both fake news and debunking expenditures and is welfare reducing. We also show, inter alia, that a stronger preference by consumers for their preferred provider lowers both fake news and debunking. Finally, we compare monopoly and duopoly market structures in terms of “fake news” provision and show that a public news provider can be welfare improving.

Suggested Citation

  • Ngo Van Long & Martin Richardson & Frank Stähler, 2018. "Media, Fake News, and Debunking," CESifo Working Paper Series 6949, CESifo.
    • Handle: RePEc:ces:ceswps:_6949
    as

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    References listed on IDEAS

    as
    1. Ruben Enikolopov & Maria Petrova & Ekaterina Zhuravskaya, 2011. "Media and Political Persuasion: Evidence from Russia," American Economic Review, American Economic Association, vol. 101(7), pages 3253-3285, December.
    2. Barrera, Oscar & Guriev, Sergei & Henry, Emeric & Zhuravskaya, Ekaterina, 2020. "Facts, alternative facts, and fact checking in times of post-truth politics," Journal of Public Economics, Elsevier, vol. 182(C).
    3. repec:hal:wpspec:info:hdl:2441/1dhd1b1s319fbai85khk40fudc is not listed on IDEAS
    4. Matthew Gentzkow & Jesse M. Shapiro & Daniel F. Stone, 2014. "Media Bias in the Marketplace: Theory," NBER Working Papers 19880, National Bureau of Economic Research, Inc.
    5. Hunt Allcott & Matthew Gentzkow, 2017. "Social Media and Fake News in the 2016 Election," NBER Working Papers 23089, National Bureau of Economic Research, Inc.
    6. Jimmy Chan & Wing Suen, 2008. "A Spatial Theory of News Consumption and Electoral Competition," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 75(3), pages 699-728.
    7. Hunt Allcott & Matthew Gentzkow, 2017. "Social Media and Fake News in the 2016 Election," Journal of Economic Perspectives, American Economic Association, vol. 31(2), pages 211-236, Spring.
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    9. Sendhil Mullainathan & Andrei Shleifer, 2005. "The Market for News," American Economic Review, American Economic Association, vol. 95(4), pages 1031-1053, September.
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    More about this item

    Keywords

    fake news; media; debunking;
    All these keywords.

    JEL classification:

    • D21 - Microeconomics - - Production and Organizations - - - Firm Behavior: Theory
    • L15 - Industrial Organization - - Market Structure, Firm Strategy, and Market Performance - - - Information and Product Quality
    • L82 - Industrial Organization - - Industry Studies: Services - - - Entertainment; Media

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