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

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 />

Results of the demo<br />

3 models<br />

Fitting our model<br />

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

Results: group sizes and overdispersions<br />

Confidence building and model extensions<br />

◮ Group sizes, β<br />

◮ Nicole: 0.17% of the social network<br />

◮ Anthony: 0.27% of the social network<br />

◮ Lawyers: 0.90% of the social network<br />

◮ Robbed last year: 0.20% of the social network<br />

◮ Scale-up<br />

◮ Nicole: 500,000<br />

◮ Anthony: 800,000<br />

◮ Lawyers: 2.6 million<br />

◮ Robbed last year: 200,000<br />

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

Studying polarization using <strong>surveys</strong>

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