Online Program Home
  My Program

All Times EDT

Abstract Details

Activity Number: 285 - New Advances in Sample Design and Adjusting for Survey Nonresponse
Type: Contributed
Date/Time: Wednesday, August 11, 2021 : 1:30 PM to 3:20 PM
Sponsor: Survey Research Methods Section
Abstract #318705
Title: Evaluation of Methods to Form Segments from Census Blocks in Area Sample Designs
Author(s): Jennifer Kali* and Tom Krenzke and Ying Chen and Jianru Angela Chen and Jim Green
Companies: Westat and Westat and Westat and WESTAT and Westat
Keywords: area sampling; multi-stage sampling; segments; in-person surveys

In-person surveys often utilize a multi-stage sample design in which households are sampled within geographic areas called segments, improving cost efficiency by restricting the geographic range that data collectors travel. Often, segments are formed by grouping neighboring census blocks until the number of housing units in the segment is large enough to support the household sample to be selected within the segment. A simple method to combine adjacent census blocks is to sort the census block file by the census block ID. Doing so often creates segments that are not contiguous, not complete (contain holes), and not compact. Issues with contiguity and completeness create challenges for data collectors in determining which housing units to include in the sample frame. Less compact segments increase interviewer travel costs. We will review alternative approaches to forming segments with three shape-filling curves – Peano, Hilbert, and Geo-hash, evaluating the segments formed by each sorting method according to contiguity, completeness, compactness, and between-segment variance, and will present segment formation software that utilizes all four sorting methods.

Authors who are presenting talks have a * after their name.

Back to the full JSM 2021 program