3 février 2022
United States. Bureau of the Census, « (Restricted) LEHD Employment History File (EHF) », Inter-university Consortium for Political and Social Research, ID : 10.3886/ICPSR37781.v1
The Employment History Files (EHF) are designed to store the complete in-state work history for each individual that appears in the UI wage records. The EHF for each state contains one record for each employee-employer combination-a job-in that state in each year. Both annual and quarterly earnings variables are available in the EHF. Individuals who are employed, but never have strictly positive earnings at their employing SEIN (a theoretical possibility) in a given year do not have a record in the EHF for that year.