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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 />

Killworth, McCarty et al. <strong>surveys</strong><br />

<strong>How</strong> <strong>many</strong> people <strong>do</strong> <strong>you</strong> know?<br />

Scale-up method<br />

“<strong>How</strong> <strong>many</strong> X’s” survey data<br />

◮ <strong>How</strong> <strong>many</strong> X’s <strong>do</strong> <strong>you</strong> know?<br />

◮ Stephanie, Jacqueline, Kimberly, Nicole, Christina, Jennifer<br />

◮ Christopher, David, Anthony, Robert, James, Michael<br />

◮ Twin, woman a<strong>do</strong>pted kid in past year, gave birth in past<br />

year, wi<strong>do</strong>w(er) under 65<br />

◮ Commercial pilot, gun dealer, postal worker, member of<br />

Jaycees, opened business in past year, American Indian<br />

◮ Suicide in past year, died in auto accident, diabetic, kidney<br />

dialysis, AIDS, HIV-positive, rape victim, homicide victim,<br />

male in prison, homeless<br />

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

Studying polarization using <strong>surveys</strong>

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