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How many X's do you know'' surveys - Columbia University

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Overview<br />

Social and political polarization<br />

Background: how <strong>many</strong> people <strong>do</strong> <strong>you</strong> know?<br />

Learning from “<strong>How</strong> <strong>many</strong> X’s <strong>do</strong> <strong>you</strong> know” <strong>surveys</strong><br />

Next<br />

Political polarization in social networks<br />

Measuring network size<br />

Political polarization in social networks<br />

◮ Geographic and social polarization<br />

◮ Proportion of Democrats and Republicans in nation, state,<br />

neighborhood, acquaintances, close friends, family<br />

◮ Parallel analysis with groups defined based on sex, ethnicity,<br />

occupation, and social class<br />

◮ Polarization and political attitudes<br />

◮ Republicans are more politically homogeneous than Democrats<br />

in their social networks<br />

◮ Compare networks of people who live in areas with more<br />

Democrats or more Republicans<br />

◮ City-dwellers have more friends but fewer close friends?<br />

Gelman, DiPrete, Salganik, Teitler, Zheng<br />

Studying polarization using <strong>surveys</strong>

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