Table 2.
Coefficients for the log-linear (Ln) and quadratic (Q) functions along with coefficients of determination (R2) for each NLTCS wave.
| NLTCS | Fit | B1 (SE) × 102 | B2 (SE) × 104 | U (SE) | R2, % |
|---|---|---|---|---|---|
| 1982 | Ln | 1.37 (.071) | −2.346 (.058) | 96.1 (93.6) | |
| Q | −1.10 (.313) | 0.93 (.193) | 0.563 (.125) | 97.7 | |
| 1984 | Ln | 1.63 (.139) | −2.615 (.113) | 90.2 (87.7) | |
| Q | −1.90 (.597) | 1.46 (.368) | 0.846 (.239) | 94.2 | |
| 1989 | Ln | 1.66 (.157) | −2.655 (.128) | 88.2 (86.0) | |
| Q | −2.81 (.360) | 2.03 (.222) | 1.202 (.144) | 98.0 | |
| 1994 | Ln | 2.72 (.116) | −3.689 (.095) | 97.3 (96.3) | |
| Q | −0.58 (.517)# | 0.75 (.318) | 0.210 (.207)# | 97.4 | |
| 1999 | Ln | 2.67 (.150) | −3.667 (.122) | 95.5 (93.8) | |
| Q | −1.63 (.514) | 1.39 (.317) | 0.627 (.206) | 97.4 |
R2 in parentheses is given for linear functions for the sake of comparison. Estimated coefficients are significant at or below the 0.05 level. A superscript “#” denotes insignificant estimates.