Summary Statistics for Nonexperimental Lalonde Data
| Covariate | CPS Controls (Nc = 15,992) | Trainees (Nt = 185) | t-stat | nor-dif | ||
|---|---|---|---|---|---|---|
| Mean | (Standard Deviation) | Mean | (Standard Deviation) | |||
| Black | 0.07 | (0.26) | 0.84 | (0.36) | 28.6 | 2.43 |
| Hispanic | 0.07 | (0.26) | 0.06 | (0.24) | −0.7 | −0.05 |
| Age | 33.23 | (11.05) | 25.82 | (7.16) | −13.9 | −0.80 |
| Married | 0.71 | (0.45) | 0.19 | (0.39) | −18.0 | −1.23 |
| No degree | 0.30 | (0.46) | 0.71 | (0.46) | 12.2 | 0.90 |
| Education | 12.03 | (2.87) | 10.35 | (2.01) | −11.2 | −0.68 |
| E’74 | 14.02 | (9.57) | 2.10 | (4.89) | −32.5 | −1.57 |
| U’74 | 0.12 | (0.32) | 0.71 | (0.46) | 17.5 | 1.49 |
| E’75 | 13.65 | (9.27) | 1.53 | (3.22) | −48.9 | −1.75 |
| U’75 | 0.11 | (0.31) | 0.60 | (0.49) | 13.6 | 1.19 |