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Living in a Partisan World

Living in a Partisan World. [1] M. H. Afrasiabi , R. Guérin , and S. Venkatesh , “Opinion Formation in Ising Networks.” Proc. ITA 2013 Workshop, San Diego, CA, February 2013.

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Living in a Partisan World

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  1. Living in a Partisan World [1] M. H. Afrasiabi, R. Guérin, and S. Venkatesh, “Opinion Formation in Ising Networks.” Proc. ITA 2013 Workshop, San Diego, CA, February 2013. [2] M. H. Afrasiabi, R. Guérin, and S. Venkatesh, “Spin glasses with attitude: opinion formation in a partisan Erdös-Rényi world.” Proc. ITA 2014 Workshop, San Diego, CA, February 2013. How does party affiliation influence opinion formation? Two models: • Party affiliation is the main criterion when evaluating others opinion • Party affiliation only reflects like-mindedness of party members, and evaluation of others opinions depends on their views on selected core issues The outcomes: • Polarized outcomes are the norm under model 1 • A threshold effect that arises even under slight party bias • Intra-party opinion diversity is preserved even in the presence of a strong party bias • Three different types of opinion equilibria that all allow for opinion diversity • The result holds under a broad range of conditions • Presence of “independents” • Presence of “zealots” • Full or random (Erdös-Rényi) graph of party influence Model 1: Likelihood of polarization as a function of party bias (100 users) Model 2: Frequency of convergence to different equilibria as a function of party bias (30 users)

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