2026/01/12 by Robert Melendez, Philippa Clarke, Grace Noppert +1 · 1 voice
paper · doi:10.3886/icpsr301419
openalex publication_date 2026/01/12 · openalex created_date 2026/01/13 · openalex updated_date 2026/07/01
<span>This dataset contains measures of the number and density of businesses and their employees deemed essential in the first year (2020) of the COVID-19 pandemic by the US Department of Homeland Security’s Cybersecurity & Infrastructure Security Agency (CISA) in versions 3.0 (April 17, 2020) and 4.0 (August 18, 2020) of their advisory guidance on the essential critical infrastructure workforce. Measures are provided for 2020 per United States Census Tract or ZIP Code Tabulation Area (ZCTA). This 2020 dataset includes four separate files for four different geographic areas (GIS shapefiles from the United States Census Bureau). The four geographies include:</span> <ul><li value="1"><span>Census Tract 2010</span></li><li value="2"><span>Census Tract 2020</span></li><li value="3"><span>ZIP Code Tabulation Area (ZCTA) 2010</span></li><li value="4"><span>ZIP Code Tabulation Area (ZCTA) 2020</span></li></ul> <span>Information about which dataset to use can be found in the Usage Notes section of the data documentation.</span>