[CTPP News] Updated R package lehdr released May 14th, for LODES/LEHD analysis

The R package “lehdr” created by Professor Jamaal Green at Penn (and others) was updated on 5/14/2023 to include year 2020 data from the Census Bureau. Yay!! This is a great way to acquire (free) data on workers-at-block (block group, tract, county, state) of residence and of workplace. The user can then link the data with census GIS files using the R program “tigris” and map and display all sorts of data. The LEHD/LODES data also has origin-destination “flows” (block-to-block, block group-to-block group, tract-to-tract, county-to-county, state-to-state). My r script using lehdr and tigris for California is free to share, here: https://github.com/chuckpurvis/r_scripts/blob/main/lehdr_California_2020.R My r script for using tidycensus to map population density (Census 2020, PL 94-171) for the Bay Area and San Francisco City is here: https://github.com/chuckpurvis/r_scripts/blob/main/PL94171_Calif_PopDensity… The “lehdr” ( pronounced “lee-ter”) package is used to download and format data from the Census Bureau’s LEHD / LODES program. ## LED = Local Employment Dynamics ## LEHD = Longitudinal Employer Household Dynamics Program ## LODES = LEHD Origin-Destination Employment Statistics ## UI = Unemployment Insurance ## QCEW = Quarterly Census of Employment and Wages ## RAC = Residence Area Characteristics ## WAC = Workplace Area Characteristics ## CES = Center for Economic Studies, US Bureau of the Census Documentation on LEHD/LODES is available from the Census Bureau here: https://lehd.ces.census.gov/data/#lodes https://lehd.ces.census.gov/data/lodes/LODES8/LODESTechDoc8.0.pdf Also of interest to MPOs and State DOTs will be the NCHRP report published 12 years ago (September 2011): https://onlinepubs.trb.org/onlinepubs/nchrp/docs/NCHRP08-36(98)_FR.pdf “Improving Employment Data for Transportation Planning” Hope this is of interest! Chuck Purvis Hayward, California ###