Activity Number:
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356
- Contributed Poster Presentations: Survey Research Methods Section
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Type:
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Contributed
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Date/Time:
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Tuesday, August 1, 2017 : 10:30 AM to 12:20 PM
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Sponsor:
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Survey Research Methods Section
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Abstract #323537
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Title:
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Challenges in Linking Demographic Data at Different Geographic Levels
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Author(s):
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Edward Mulrow* and Rebecca Curtis and Ned English and Yongheng Lin and Ilana Ventura
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Companies:
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NORC and NORC at the University of Chicago and NORC at the University of Chicago and NORC at the University of Chicago and NORC at the University of Chicago
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Keywords:
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GIS ;
geography ;
ACS ;
ZIP code ;
census tract ;
calibration
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Abstract:
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Researchers can be challenged by data sets published at incongruent levels of aggregation. However, there exists the need to combine such data while maintaining its integrity and geographic relationships. We explore two approaches with trade-offs in accuracy and efficiency, with a focus on ZIP codes and US Census tracts. Our first method uses geographic information systems (GIS) to weight tract-level data from the American Community Survey (ACS) based on spatial overlap. The weights are the percent of area overlap for each tract intersecting each ZIP code. This method avoids the duplication of data caused by allocating all of a tract's data to each ZIP code it intersects and allows for a more nuanced distribution of data over matching the tract centroid to the ZIP code. Secondly, we describe a framework that uses calibration techniques to estimate overlapping regions based on published margin totals. The overlap proportion is used to allocate a portion of each tract to the ZIP code. Exploratory analysis provides insight into the strengths and weaknesses of each approach.
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Authors who are presenting talks have a * after their name.