IDEAS home Printed from https://ideas.repec.org/p/zbw/cfswop/626.html
   My bibliography  Save this paper

Populism and polarization in social media without fake news: The vicious circle of biases, beliefs and network homophily

Author

Listed:
  • Hakobyana, Zaruhi
  • Koulovatianos, Christos

Abstract

We build a search-and-matching algorithm of network dynamics with decision-making under incomplete information, seeking to understand the determinants of the observed gradual downgrading of expert opinion on complicated issues and the decreasing trust in science. Even without fake news, combining the internet's ease of forming networks with (a) individual biases, such as confirmation bias or assimilation bias, and (b) people's tendency to align their actions with those of peers, produces populist and polarization network dynamics. Homophily leads to actions with more weight on biases and less weight on expert opinion, and such actions lead to more homophily.

Suggested Citation

  • Hakobyana, Zaruhi & Koulovatianos, Christos, 2019. "Populism and polarization in social media without fake news: The vicious circle of biases, beliefs and network homophily," CFS Working Paper Series 626, Center for Financial Studies (CFS).
    • Handle: RePEc:zbw:cfswop:626
    as

    Download full text from publisher

    File URL: https://www.econstor.eu/bitstream/10419/203250/1/1671166531.pdf
    Download Restriction: no
    ---><---

    References listed on IDEAS

    as
    1. Bramoullé, Yann & Currarini, Sergio & Jackson, Matthew O. & Pin, Paolo & Rogers, Brian W., 2012. "Homophily and long-run integration in social networks," Journal of Economic Theory, Elsevier, vol. 147(5), pages 1754-1786.
    2. Lawrence C. Hamilton & Joel Hartter & Kei Saito, 2015. "Trust in Scientists on Climate Change and Vaccines," SAGE Open, , vol. 5(3), pages 21582440156, August.
    3. Dani Rodrik, 2018. "Populism and the economics of globalization," Journal of International Business Policy, Palgrave Macmillan, vol. 1(1), pages 12-33, June.
    4. Do, Quoc-Anh & Dalvit, Nicolò & Le Chapelain, Alexis & Zenou, Yves, 2019. "Friendship Networks and Political Opinions: A Natural Experiment among Future French Politicians," CEPR Discussion Papers 13771, C.E.P.R. Discussion Papers.
    5. Currarini, Sergio & Mengel, Friederike, 2016. "Identity, homophily and in-group bias," European Economic Review, Elsevier, vol. 90(C), pages 40-55.
    6. Abhijit Banerjee & Arun G Chandrasekhar & Esther Duflo & Matthew O Jackson, 2019. "Using Gossips to Spread Information: Theory and Evidence from Two Randomized Controlled Trials," The Review of Economic Studies, Review of Economic Studies Ltd, vol. 86(6), pages 2453-2490.
    7. Hunt Allcott & Matthew Gentzkow, 2017. "Social Media and Fake News in the 2016 Election," NBER Working Papers 23089, National Bureau of Economic Research, Inc.
    8. Sergio Currarini & Matthew O. Jackson & Paolo Pin, 2009. "An Economic Model of Friendship: Homophily, Minorities, and Segregation," Econometrica, Econometric Society, vol. 77(4), pages 1003-1045, July.
    9. Damon M. Centola, 2013. "Homophily, networks, and critical mass: Solving the start-up problem in large group collective action," Rationality and Society, , vol. 25(1), pages 3-40, February.
    10. repec:hal:spmain:info:hdl:2441/6g4f57e9if8d98agaso2prcnu9 is not listed on IDEAS
    11. Matthew Gentzkow & Jesse M. Shapiro, 2006. "Media Bias and Reputation," Journal of Political Economy, University of Chicago Press, vol. 114(2), pages 280-316, April.
    12. Timothy Besley & Andrea Prat, 2006. "Handcuffs for the Grabbing Hand? Media Capture and Government Accountability," American Economic Review, American Economic Association, vol. 96(3), pages 720-736, June.
    13. Sendhil Mullainathan & Andrei Shleifer, 2005. "The Market for News," American Economic Review, American Economic Association, vol. 95(4), pages 1031-1053, September.
    14. Yann Algan & Nicolò Dalvit & Quoc-Anh Do & Alexis Le Chapelain & Yves Zenou, 2019. "Friendship Networks and Political Opinions: A Natural Experiment among Future French Politicians," Working Papers hal-03456887, HAL.
    15. Koop,Gary & Poirier,Dale J. & Tobias,Justin L., 2007. "Bayesian Econometric Methods," Cambridge Books, Cambridge University Press, number 9780521671736, June.
    16. Halberstam, Yosh & Knight, Brian, 2016. "Homophily, group size, and the diffusion of political information in social networks: Evidence from Twitter," Journal of Public Economics, Elsevier, vol. 143(C), pages 73-88.
    17. Myatt, David P. & Wallace, Chris, 2019. "Information acquisition and use by networked players," Journal of Economic Theory, Elsevier, vol. 182(C), pages 360-401.
    18. Chan,Joshua & Koop,Gary & Poirier,Dale J. & Tobias,Justin L., 2019. "Bayesian Econometric Methods," Cambridge Books, Cambridge University Press, number 9781108437493.
    19. repec:hal:spmain:info:hdl:2441/5b1u7t12sb8ikq4csvts6tsa3h is not listed on IDEAS
    20. Mortensen, Dale & Pissarides, Christopher, 2011. "Job Creation and Job Destruction in the Theory of Unemployment," Ekonomicheskaya Politika / Economic Policy, Russian Presidential Academy of National Economy and Public Administration, vol. 1, pages 1-19.
    21. 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.
    22. Chan,Joshua & Koop,Gary & Poirier,Dale J. & Tobias,Justin L., 2019. "Bayesian Econometric Methods," Cambridge Books, Cambridge University Press, number 9781108423380.
    23. Baron, David P., 2006. "Persistent media bias," Journal of Public Economics, Elsevier, vol. 90(1-2), pages 1-36, January.
    24. 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.
    25. Kiyotaki, Nobuhiro & Wright, Randall, 1993. "A Search-Theoretic Approach to Monetary Economics," American Economic Review, American Economic Association, vol. 83(1), pages 63-77, March.
    26. Sendhil Mullainathan & Andrei Shleifer, 2005. "The Market for News," American Economic Review, American Economic Association, vol. 95(4), pages 1031-1053, September.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Ascensión Andina-Díaz & José A. García-Martínez & Antonio Parravano, 2019. "The market for scoops: a dynamic approach," SERIEs: Journal of the Spanish Economic Association, Springer;Spanish Economic Association, vol. 10(2), pages 175-206, June.
    2. Sylvain Dejean & Marianne Lumeau & Stéphanie Peltier, 2021. "Partisan selective exposure in news consumption," Working Papers hal-03295625, HAL.
    3. Miura, Shintaro, 2019. "Manipulated news model: Electoral competition and mass media," Games and Economic Behavior, Elsevier, vol. 113(C), pages 306-338.
    4. Dejean, Sylvain & Lumeau, Marianne & Peltier, Stéphanie, 2022. "Partisan selective exposure in news consumption," Information Economics and Policy, Elsevier, vol. 60(C).
    5. Edmond, Chris & Lu, Yang K., 2021. "Creating confusion," Journal of Economic Theory, Elsevier, vol. 191(C).
    6. Germano, Fabrizio & Sobbrio, Francesco, 2020. "Opinion dynamics via search engines (and other algorithmic gatekeepers)," Journal of Public Economics, Elsevier, vol. 187(C).
    7. Felix Chopra & Ingar K. Haaland & Christopher Roth, 2019. "Do People Value More Informative News?," CESifo Working Paper Series 8026, CESifo.
    8. Cagé, Julia, 2020. "Media competition, information provision and political participation: Evidence from French local newspapers and elections, 1944–2014," Journal of Public Economics, Elsevier, vol. 185(C).
    9. Antony Millner & Hélène Ollivier, 2016. "Beliefs, Politics, and Environmental Policy," Review of Environmental Economics and Policy, Association of Environmental and Resource Economists, vol. 10(2), pages 226-244.
    10. Zenou, Yves & Campbell, Arthur & Leister, Matthew, 2019. "Social Media and Polarization," CEPR Discussion Papers 13860, C.E.P.R. Discussion Papers.
    11. Cagé, Julia, 2017. "Media Competition, Information Provision and Political Participation: Evidence from French Local Newspapers and Elections, 1944," CEPR Discussion Papers 12198, C.E.P.R. Discussion Papers.
    12. Julia Cage, 2017. "Media Competition, Information Provision and Political Participation: Evidence from French Local Newspapers and Elections, 1944-2014," SciencePo Working papers hal-03393164, HAL.
    13. Robbett, Andrea & Matthews, Peter Hans, 2018. "Partisan bias and expressive voting," Journal of Public Economics, Elsevier, vol. 157(C), pages 107-120.
    14. Redlicki, B., 2017. "Spreading Lies," Cambridge Working Papers in Economics 1747, Faculty of Economics, University of Cambridge.
    15. Vincent Bignon & Marc Flandreau, 2012. "The Price of Media Capture and the Looting of Newspapers in Interwar France," IHEID Working Papers 09-2012, Economics Section, The Graduate Institute of International Studies.
    16. Federico Vaccari, 2023. "Influential news and policy-making," Economic Theory, Springer;Society for the Advancement of Economic Theory (SAET), vol. 76(4), pages 1363-1418, November.
    17. Ascensión Andina-Díaz, 2009. "Media competition and information disclosure," Social Choice and Welfare, Springer;The Society for Social Choice and Welfare, vol. 32(4), pages 705-705, May.
    18. Larcinese, Valentino & Sircar, Indraneel, 2017. "Crime and punishment the British way: Accountability channels following the MPs’ expenses scandal," European Journal of Political Economy, Elsevier, vol. 47(C), pages 75-99.
    19. Ozerturk, Saltuk, 2022. "Media access, bias and public opinion," European Economic Review, Elsevier, vol. 147(C).
    20. repec:spo:wpmain:info:hdl:2441/16juu6v6rg8rq8nl0u1grb4jm6 is not listed on IDEAS
    21. Piolatto, Amedeo & Schuett, Florian, 2015. "Media competition and electoral politics," Journal of Public Economics, Elsevier, vol. 130(C), pages 80-93.

    More about this item

    Keywords

    network dynamics; internet; higher-order beliefs; learning; expertopinions; biased assimilation; confirmation bias;
    All these keywords.

    JEL classification:

    • D85 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Network Formation
    • D83 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Search; Learning; Information and Knowledge; Communication; Belief; Unawareness
    • D82 - Microeconomics - - Information, Knowledge, and Uncertainty - - - Asymmetric and Private Information; Mechanism Design
    • D72 - Microeconomics - - Analysis of Collective Decision-Making - - - Political Processes: Rent-seeking, Lobbying, Elections, Legislatures, and Voting Behavior
    • C78 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Bargaining Theory; Matching Theory

    NEP fields

    This paper has been announced in the following NEP Reports:

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:zbw:cfswop:626. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ZBW - Leibniz Information Centre for Economics (email available below). General contact details of provider: https://edirc.repec.org/data/ifkcfde.html .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.