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Charles Q Lau, Jennifer Unangst, Stephanie Eckman, Pramod Bhatt, Jonathan Evans, Martha McRoy, Kelsey Starr, Lisa Thalji, Justine Allpress, Kasey Jones, Jamie Cajka, John David Bunker, A Comparison of Geosampling and Random Walk Methods for Household Sample Selection in Uttar Pradesh, India, International Journal of Public Opinion Research, Volume 33, Issue 4, Winter 2021, Pages 1062–1073, https://doi.org/10.1093/ijpor/edab020
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Abstract
Our research evaluates an innovative sampling technique for household surveys called “geosampling” which leverages recent advances in geographic information systems, computer vision algorithms, and satellite imagery. We compare geosampling to the random walk method. We conducted two surveys in Uttar Pradesh, India: one using geosampling (1,026 completes) and another using random walk (939 completes). We compare the two sampling techniques along three dimensions: (a) performance indicators—response rates and contact attempts; (b) sample composition; and (c) components of variance. We help researchers understand the survey contexts for which geosampling and random walk are best suited.