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

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Overview Social and political polarization Background: how many people do you know? Learning from “How many X’s do you know” surveys Next How many people do you know? Scale-up method “How many X’s” survey data How many people do you know? Demonstration ◮ How many people do you know named Nicole? ◮ How many people do you know named Anthony? ◮ How many lawyers do you know? ◮ How many people do you know who were robbed in the past year? Gelman, DiPrete, Salganik, Teitler, Zheng Studying polarization using surveys
Overview Social and political polarization Background: how many people do you know? Learning from “How many X’s do you know” surveys Next Scale-up method: demonstration How many people do you know? Scale-up method “How many X’s” survey data ◮ On average, you knew 0.6 Nicoles ◮ 0.13% of Americans are named Nicole ◮ Assume 0.13% of your acquaintances are Nicoles ◮ Estimate: on average, you know 0.6/0.0013 = 450 people ◮ On average, you know 0.8 Anthonys ◮ 0.31% of Americans are named Anthony ◮ Estimate: on average, you know 0.8/0.0031 = 260 people ◮ Why do these differ? Gelman, DiPrete, Salganik, Teitler, Zheng Studying polarization using surveys
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How many X's do you know'' surveys - Columbia University

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