Duncan SEI Socioeconomic Index Calculator
Apply Duncan's 1961 regression to an occupation's high-income and high-school-graduate percentages to estimate its historical socioeconomic index score.
Description
Apply Duncan's 1961 regression to an occupation's high-income and high-school-graduate percentages to estimate its historical socioeconomic index score.
Duncan SEI Socioeconomic Index Calculator is a focused tool for the following task. Apply Duncan's 1961 regression to an occupation's high-income and high-school-graduate percentages to estimate its historical socioeconomic index score. It reports SEI from the values you provide rather than inventing measurements, coefficients, or professional judgment that are not part of the input.
When to use Duncan SEI Socioeconomic Index
Use this sociology calculation to reproduce a named demographic, inequality, mobility, urban, or survey measure when the population, period, categories, and coding rules are explicit.
- High-school graduates
- Required number. Percentage of male incumbents in the occupation who were high-school graduates in the historical 1950 Census definition.
- High-income incumbents
- Required number. Percentage of male incumbents in the occupation earning at least $3,500 in 1949 under the historical definition.
The cited overview of Sociology supplies background for the terminology and domain context used by this tool.1
How Duncan SEI Socioeconomic Index works
Apply Duncan's 1961 regression to an occupation's high-income and high-school-graduate percentages to estimate its historical socioeconomic index score. Inputs are interpreted exactly in the displayed units and the calculation returns the following fields without presentation rounding.
- SEI
- Returned number. Historical Duncan estimate: 0.59 times the income percentage plus 0.55 times the education percentage minus 6.
Limitations and assumptions
- Definitions, sampling error, missing data, historical context, geographic boundaries, weighting, and classification choices can materially change social indicators and their interpretation.
- High-school graduates must be at least 0.
- High-school graduates must be no greater than 100.
- High-income incumbents must be at least 0.
- High-income incumbents must be no greater than 100.
- Use finite inputs in the displayed units, preserve source measurements and assumptions, and independently verify consequential decisions.
Alternative or Complementary approaches
Report the source population and uncertainty, inspect disaggregated data, and compare multiple accepted indicators rather than treating one summary statistic as a complete social explanation.
References
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Sociology — Wikipedia contributors
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