Understanding LEHD and Synthetic Home to Work Flows in "ON THE MAP"
Where do the Data Come From? Text version
The data used in "On the Map" come from two sources. Home Block Data and Workplace Block Data.
- The first source is called Home Block data and is related to where workers live. Information on home location comes from the StARS database. The Home Block data come from the Unemployment Insurance wage data submitted by each state.
- Home block data describes the number of workers (primary job) in a specific geographic area and can be broken down by age range (3), earnings range (3) and the 20 North American Industry Classification System, or NAICS, industry sectors. NAICS sectors have replaced the previously used Standard Industrial Codes. The ranges for age and earnings were approved by the Census Bureau Disclosure Review Board.
The second data source is called Workplace Block data and is related to where the workers work. The Workplace Block data come from the Quarterly Census of Employment and Wages or ES-202 information provided by each state which is compiled from reports filed by employers each quarter.
- Workplace Block data tell the number of business establishments and the number of workers in a specific area along with same breakdowns of age range (3), earning range (3), and industry (20).
- The data also include the demand/growth indicators of job creation or loss, hires and separations, and earnings for new hires and separations.
- The data are the product of a Federal-State cooperative program.
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