Table 3.
Evolution of Uncertainty
| NLS/1966 | |||
| College | High School | Returns | |
| Total Variance | 195.882 | 136.965 | 611.245 |
| Variance of Unforecastable Components | 76.332 | 31.615 | 167.187 |
| Variance of Forecastable Components | 119.550 | 105.350 | 444.058 |
| NLS/1979 | |||
| College | High School | Returns | |
| Total Variance | 292.368 | 165.350 | 823.200 |
| Variance of Unforecastable Components | 84.464 | 48.137 | 221.976 |
| Variance of Forecastable Components | 207.904 | 117.214 | 601.223 |
| Evolution | |||
| Percentage Increase in Total Variance | 49.26% | 20.72% | 34.68% |
| Percentage Increase in Variance of Unforecastable Components | 10.65% | 52.26% | 32.77% |
| Percentage Increase in Variance of Forecastable Components | 73.90% | 11.26% | 35.39% |
| Percentage Increase in Total Variance by Source | |||
| College | High School | Returns | |
| Percentage Increase in Total Variance due to Unforecastable Components | 8.43% | 58.20% | 25.85% |
| Percentage Increase in Total Variance due to Forecastable Components | 91.57% | 41.80% | 74.15% |