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LEHD OnTheMap Data

LEHD OnTheMap Data. 2011 GIS in Public Transportation Tampa, FL. Bruce Spear. September 15, 2011. Acknowledgements. Findings from NCHRP 8-36, Task 98 Improving Employment Data for Transportation Planning Sponsored by AASHTO Standing Committee on Planning

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LEHD OnTheMap Data

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  1. LEHD OnTheMap Data 2011 GIS in Public Transportation Tampa, FL Bruce Spear September 15, 2011

  2. Acknowledgements Findings from NCHRP 8-36, Task 98 Improving Employment Data for TransportationPlanning • Sponsored by AASHTO Standing Committee on Planning • Final Report posted at http://onlinepubs.trb.org/onlinepubs/nchrp/docs/NCHRP08-36(98)_FR.pdf

  3. What is LEHD? Longitudinal Employment Household Dynamics • Program to generate new information on workers and employers from existing data sources • Developed by U.S. Census Bureau in coordination with state partners • Based on administrative records • Includes all employment subject to state unemployment insurance (UI) laws

  4. LEHD Data Products • Quarterly Workforce Indicators (QWI) • Quarterly data on employment dynamics (total employment, job creation, wages, and worker turnover) • LEHD Origin-Destination Employment Statistics (LODES) • Annual data on locations and characteristics of workers by residence and workplace, and home-to-work flows

  5. LEHD - OnTheMap • Web-based mapping and reporting application http://lehdmap.did.census.gov/ • Supports multiple analyses involving workplace and worker residence locations • Queries supported atmultiple levels of geography (Census Blocks, Tracts, zip codes, places, urbanized areas, counties, states) • Worker characteristics include: industry type, age, income, race, ethnicity, and education

  6. LODES Data Files • Residence Area Characteristics (RAC) Number and characteristics of workers summarized by residence geography and reporting year • Workplace Area Characteristics (WAC) Number and characteristics of workers summarized by workplace geography and reporting year • Origin-Destination Flows (OD) Number and summary characteristics of workers who reside in one location and work in another location

  7. LODES Data Sources • Employer Characteristics Quarterly Census of Employment & Wages (QCEW) • Reported quarterly by employers to State employment security agencies (SESA) (formerly known as ES-202 data) • Funded and managed by BLS (data quality and integrity) • Enhanced employer files contain data on total monthly employment and total wages by quarter • Multiple Workplace Reports (MWR) provide workplace employment data for employers with multiple worksites.

  8. Data Sources (continued) • Worker Characteristics Personal Characteristics File (PCF) • Derived from Social Security Application File (Numident) • Gender, DOB, Race, Citizenship Composite Person Record (CPR) • Derived from multiple sources (IRS, Medicare, HUD) • Based on worker’s SSN • Worker place of residence Wage Records • List individual employees by social Security Number (SSN) • Provide key link between workers and employers

  9. LEHD Processing Steps

  10. LODES Data Limitations • Excludes some employment categories • Self-employed & Sole Proprietors (6% - 17%) • Federal/Military/Railroad Workers (1% - 20%) • Employment exempt from UI laws (0% - 2%) • Data not currently produced for all States • States missing data include: DC, MA, NH, PR, VI

  11. LODES Data Issues • Multiple Worksite Employers • Some multi-worksite employers refuse to file multiple worksite reports (MWR) • Employers with multiple worksites may show all employees located at primary employer address • MWR non-compliance affects about 5% of all employment, nationwide: • Rates vary significantly from state to state • Lower in States with mandatory MWR reporting • Highest non-compliance among local government agencies

  12. LODES vs. CTPP • LODES is NOT a substitute for CTPP • No trip characteristics in LODES (mode, travel time, departure time) • Public sources of employment data for transportation planning: • Residence/Workplace locations • Origin-destination flows for work trips

  13. LODES vs. CTPP (3-Year)Summary Characteristics

  14. LODES vs. CTPP (3-Year)County Level Findings • Both LODES and CTPP under report total employment by 15 – 17 %, nationally and by state • LEHD – excluded employer categories & non-LED states • CTPP – secondary work trips and suppressed data • CTPP (3-Year) produces significantly higher OD trip rates than LODES, but distributes them over many fewer county pairs.

  15. LODES vs. CTPP (2000)Tract Level Findings • CTPP (2000) produced higher OD trip rates than LODES, but distributed them over many fewer Tract-to-Tract pairs. • Differences in flow rates between common Tracts were much smaller • Differences in employment for individual Tracts could generally be attributed to: • Missing employment categories in LODES • New development occurring after 2000 • i

  16. Work Trip Length Distributions

  17. General Findings • LODES is a good source of data on the distribution of home-to-work flows • More comprehensive and current than CTPP • LODES data should be used carefully and supplemented with local knowledge • Missing employment categories • Multiple worksite employers

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