Table 1:
Descriptive Statistics, Census and NLSY79
| Distribution of Age Difference | Mean AFQT Scores | ||||
|---|---|---|---|---|---|
| 2000 Census | 1960 Census | NLSY79 1st Marriages | NLSY79 1st Marriages | ||
| Men | Women | ||||
| Age Difference: | |||||
| +8 or more | 0.093 | 0.128 | 0.082 | 33.2 (28.1) | 37.1 (28.7) |
| +5 to 7 | 0.126 | 0.166 | 0.122 | 39.5 (30.2) | 38.4 (28.9) |
| +2 to 4 | 0.300 | 0.315 | 0.319 | 40.5 (30.6) | 39.6 (28.1) |
| +1 to −1 | 0.344 | 0.287 | 0.350 | 42.8 (31.3) | 42.5 (29.7) |
| −2 to −4 | 0.087 | 0.068 | 0.090 | 39.6 (31.9) | 37.9 (29.0) |
| −5 to −7 | 0.017 | 0.012 | 0.024 | 32.9 (30.4) | 39.8 (28.5) |
| −8 or more | 0.020 | 0.014 | 0.016 | 29.1 (26.2) | 33.4 (27.0) |
| N | 1,897,553 | 270,546 | 9,387 | 4,502 | 4,885 |
Notes: Age difference is man’s age minus woman’s age. Samples in columns 1–2 include married couples ages 25–60. Samples in columns 3–5 include first marriages in the NLSY79. Standard deviations are in parentheses.