IDEAS home Printed from https://ideas.repec.org/
MyIDEAS: Log in (now much improved!) to save this paper

Media and Polarization

Listed author(s):
  • Campante, Filipe R.

    (Harvard University)

  • Hojman, Daniel

    (Harvard University)

This paper provides a model of how media environments affect political polarization. We first develop a model of how media environments, characterized by their levels of accessibility and variety of content, interact with citizens' ideological views and attitudes and political motivation. We then embed it in a model of majoritarian electoral competition in which politicians react to those media-influenced views. We show how equilibrium polarization is affected by changes in the media environment, through two channels: the variety effect, whereby a decrease in media variety leads to convergence in citizens' views and hence to lower polarization; and the composition effect, whereby a lowering of barriers to media accessibility increases turnout and hence lowers polarization, since newly motivated voters are relatively more moderate. We take the model's predictions to the data, in the US context of the introduction of broadcast TV, in the 1940s and 1950s, and radio, in the 1920s and 1930s. We show that, consistent with the model's predictions, TV decreased polarization, and exposure to (network) radio was correlated with lower polarization. The evidence suggests that the variety effect was more important than the composition effect.

If you experience problems downloading a file, check if you have the proper application to view it first. In case of further problems read the IDEAS help page. Note that these files are not on the IDEAS site. Please be patient as the files may be large.

File URL: https://research.hks.harvard.edu/publications/workingpapers/citation.aspx?PubId=6992&type=WPN
Download Restriction: no

Paper provided by Harvard University, John F. Kennedy School of Government in its series Working Paper Series with number rwp10-002.

as
in new window

Length:
Date of creation: Jan 2010
Handle: RePEc:ecl:harjfk:rwp10-002
Contact details of provider: Postal:
79 JFK Street, Cambridge, MA 02138

Fax: 617-496-2554
Web page: http://www.ksg.harvard.edu/research/working_papers/index.htm

More information through EDIRC

References listed on IDEAS
Please report citation or reference errors to , or , if you are the registered author of the cited work, log in to your RePEc Author Service profile, click on "citations" and make appropriate adjustments.:

as
in new window


  1. Edward L. Glaeser & Giacomo A. M. Ponzetto & Jesse M. Shapiro, 2005. "Strategic Extremism: Why Republicans and Democrats Divide on Religious Values," The Quarterly Journal of Economics, Oxford University Press, vol. 120(4), pages 1283-1330.
  2. Alan S. Gerber & Dean Karlan & Daniel Bergan, 2009. "Does the Media Matter? A Field Experiment Measuring the Effect of Newspapers on Voting Behavior and Political Opinions," American Economic Journal: Applied Economics, American Economic Association, vol. 1(2), pages 35-52, April.
  3. Stefano DellaVigna & Matthew Gentzkow, 2010. "Persuasion: Empirical Evidence," Annual Review of Economics, Annual Reviews, vol. 2(1), pages 643-669, 09.
  4. Matthew Gentzkow & Jesse M. Shapiro & Michael Sinkinson, 2011. "The Effect of Newspaper Entry and Exit on Electoral Politics," American Economic Review, American Economic Association, vol. 101(7), pages 2980-3018, December.
  5. Campante, Filipe R. & Hojman, Daniel A., 2013. "Media and polarization," Journal of Public Economics, Elsevier, vol. 100(C), pages 79-92.
  6. Stefano DellaVigna & Ethan Kaplan, 2007. "The Fox News Effect: Media Bias and Voting," The Quarterly Journal of Economics, Oxford University Press, vol. 122(3), pages 1187-1234.
  7. Matthew A. Gentzkow & Jesse M. Shapiro, 2004. "Media, Education and Anti-Americanism in the Muslim World," Journal of Economic Perspectives, American Economic Association, vol. 18(3), pages 117-133, Summer.
  8. Robert Jensen & Emily Oster, 2009. "The Power of TV: Cable Television and Women's Status in India," The Quarterly Journal of Economics, Oxford University Press, vol. 124(3), pages 1057-1094.
  9. Eliana La Ferrara & Alberto Chong & Suzanne Duryea, 2012. "Soap Operas and Fertility: Evidence from Brazil," American Economic Journal: Applied Economics, American Economic Association, vol. 4(4), pages 1-31, October.
  10. Joan Esteban & Debraj Ray, 2011. "Linking Conflict to Inequality and Polarization," American Economic Review, American Economic Association, vol. 101(4), pages 1345-1374, June.
  11. Keefer, Philip & Knack, Stephen, 2002. "Polarization, Politics and Property Rights: Links between Inequality and Growth," Public Choice, Springer, vol. 111(1-2), pages 127-154, March.
  12. Melvin Hinich & Peter Ordeshook, 1969. "Abstentions and equilibrium in the electoral process," Public Choice, Springer, vol. 7(1), pages 81-106, September.
  13. Ruben Durante & Brian Knight, 2012. "Partisan Control, Media Bias, And Viewer Responses: Evidence From Berlusconi'S Italy," Journal of the European Economic Association, European Economic Association, vol. 10(3), pages 451-481, 05.
  14. 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.
  15. Matthew Gentzkow, 2006. "Television and Voter Turnout," The Quarterly Journal of Economics, Oxford University Press, vol. 121(3), pages 931-972.
  16. Montalvo, Jose G. & Reynal-Querol, Marta, 2005. "Ethnic diversity and economic development," Journal of Development Economics, Elsevier, vol. 76(2), pages 293-323, April.
  17. Anthony Downs, 1957. "An Economic Theory of Political Action in a Democracy," Journal of Political Economy, University of Chicago Press, vol. 65, pages 135-135.
  18. David Strömberg, 2004. "Radio's Impact on Public Spending," The Quarterly Journal of Economics, Oxford University Press, vol. 119(1), pages 189-221.
Full references (including those not matched with items on IDEAS)

This item is not listed on Wikipedia, on a reading list or among the top items on IDEAS.

When requesting a correction, please mention this item's handle: RePEc:ecl:harjfk:rwp10-002. See general information about how to correct material in RePEc.

For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: ()

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 references are entirely missing, you can add them using this form.

If the full references list an item that is present in RePEc, but the system did not link 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 profile, as there may be some citations waiting for confirmation.

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

This information is provided to you by IDEAS at the Research Division of the Federal Reserve Bank of St. Louis using RePEc data.