Data Quality and the ACS Introduction to the ACS Aggregator
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Data Quality and the ACS Introduction to the ACS Aggregator Lisa Neidert January 18, 2012 PSC Data Workshop Ann Arbor, MI
description
Data Quality and the ACS Introduction to the ACS Aggregator. Lisa Neidert January 18, 2012 PSC Data Workshop Ann Arbor, MI. Synopsis . Census long-form data were not as good as you thought ACS data are worse Collapse cells or combine geographies Tool: ACS Aggregator [Beta]. - PowerPoint PPT Presentation
Transcript of Data Quality and the ACS Introduction to the ACS Aggregator
Data Quality and the ACS
Introduction to the ACS Aggregator
Lisa Neidert
January 18, 2012PSC Data WorkshopAnn Arbor, MI
Synopsis
Census long-form data were not as good as you thought
ACS data are worse
Collapse cells or combine geographies
Tool: ACS Aggregator [Beta]
ACS Data Quality Issues
Sample Size 1 in 8 instead of 1 in 6
Mixed Mode Non-response is a ~1 in 3 sample Uneven response across geography
Population Controls Only at state/county Long-form data had short-form
Geographic Variation in ACS mail response: by pseudo county (2006-2008)
Census Bureau Solutions
Increase sample size 3.4 million households
Re-distribute sample Small census tracts + Low response areas + Large census tracts; high response areas –
Research
Education
PSC ACS Aggregator
Helps users re-calibrate margins of error after combining geographies or collapsing cells
Statistical Review
Compass Series: Technical Appendix
Practice Data
Seattle: Capitol Hill Neighborhood Table B11001
Combine Geographies
Enter Name, Estimate, MOE for all geographies
Collapse Cells
Enter Name, Estimate, MOE for each column Geographies will be repeated
