Table 1.
Decomposition of Trends in Personal Income Inequality
| Period | Compositional effect |
Between-group effect |
Within-group effect |
|||
|---|---|---|---|---|---|---|
| Est. | 95% CI | Est. | 95% CI | Est. | 95% CI | |
| Social Class Position | ||||||
| 1980s to 1990s | –0.04 | (–0.06, –0.01) | –0.15 | (–0.24, –0.08) | 1.19 | (1.11, 1.28) |
| 1980s to 2000s | –0.11 | (–0.13, –0.09) | 0.18 | (0.15, 0.20) | 0.94 | (0.91, 0.96) |
| 1990s to 2000s | –0.10 | (–0.13, –0.07) | 0.33 | (0.29, 0.37) | 0.77 | (0.73, 0.81) |
| Social Class Strata | ||||||
| 1980s to 1990s | 0.02 | (–0.01, 0.06) | –0.19 | (–0.28, –0.11) | 1.16 | (1.08, 1.25) |
| 1980s to 2000s | –0.10 | (–0.13, –0.08) | 0.29 | (0.26, 0.32) | 0.81 | (0.78, 0.84) |
| 1990s to 2000s | –0.16 | (–0.20, –0.12) | 0.55 | (0.50, 0.61) | 0.61 | (0.56, 0.65) |
Notes: Sample includes respondents who are 18 to 65 years old and work full-time in the 1980 to 2010 GSS waves. Results are based on 10 multiple imputation datasets. Confidence intervals are based on quantiles of 500 bootstrap sample estimates.