. . . . . . . "SEI is a constructed measure that assigns a Duncan Socioeconomic Index (SEI) score to each occupation using the 1950 occupational classification scheme available in the OCC1950 variable. The SEI is a measure of occupational status based upon the income level and educational attainment associated with each occupation in 1950." . "SEI | Socioeconomic Index for Occupations" . . . . "RSA" . "MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCoKFb7LKlXyBB7BUvjFF9bDJNk0WxH3Xerr4H3v/VCiRVshEDl3BZVekbMMmdRe+TOPyc8AOLd9IAL2VfVVD/T0rmCHk7Pw7DQjI96mwyeXhE7f4g0WG5UT5Pxxm0Rzy7IrYnEaaVDs7dkZUt952M6qWlHfTwCQDcXJhZfLiXoMwIDAQAB" . "el1kreXFl5r880o404VNYGTkqW4gQtIkRauLOfzXoL4vUC6BKDfPemwr1erLMpWwyqjU6Sy18KNrUnfIPOksfEXOWmo3XftbTt5vuccthdruH9o0YJqs+CQsDA1rudNPCChqgI1Wj0Zo6NoJxL9sbBe4dDYAbFVdBoIMq5FaEZc=" . . "2025-04-25T09:59:59Z"^^ . . . . .