Table 3.
Parameter estimates of Random Parameter Logit (RPL) for pooled sample and the four groups.
| Mean Values | Pooled Sample | NH | NL | OH | OL |
|---|---|---|---|---|---|
| FAT | 0.82 | 0.70 | 0.63 | 1.11 | 0.77 |
| (5.57) *** | (3.13) *** | (1.55) | (3.57) *** | (2.28) ** | |
| SALT | 0.21 | −0.16 | −0.33 | 0.92 | 0.68 |
| (1.33) | (−0.66) | (−0.57) | (3.00) ** | (2.04) ** | |
| FSALT | 0.37 | 0.46 | 0.94 | 0.19 | 0.27 |
| (2.32) ** | (1.88) * | (1.54) | −0.58 | −0.77 | |
| NO BUY | −2.72 | −3.06 | −1.82 | −2.39 | −2.94 |
| (−15.32) *** | (−10.82) *** | (−3.60) *** | (−6.92) *** | (−7.39) *** | |
| PRICE | −1.98 | −2.14 | −1.36 | −1.61 | −2.49 |
| (−19.68) *** | (−13.32) *** | (−4.69) *** | (−8.27) *** | (−10.92) *** | |
| Standard deviations of parameter distributions | |||||
| FAT | 1.91 | 1.76 | 1.55 | 2.67 | 2.08 |
| (13.64) *** | (7.88) **** | (3.94) *** | (6.89) *** | (5.28) *** | |
| SALT | 2.32 | 2.05 | 3.12 | 2.41 | 2.24 |
| (14.48) *** | (10.10) *** | (4.25) *** | (7.732) *** | (6.91) *** | |
| FSALT | 1.37 | 1.35 | 1.71 | 1.64 | 1.12 |
| (7.98) *** | (4.16) *** | (4.25) *** | (5.01) *** | (4.24) *** | |
| χ2 | 2868.88 | 1068.13 | 198.96 | 958.05 | 698.62 |
| n#obervations | 11124 | 4356 | 1044 | 3276 | 2448 |
| Pseudo R2 | 0.35 | 0.33 | 0.26 | 0.40 | 0.39 |
| Loglikelihood | −2639.2 | −1061.1 | −282.8 | −720.6 | −547.1 |
| H0 = Test of equality across sub − samples | 54.9 *** | ||||
(***) (**) (*) denotes statistical significance at 1%, 5%, and 10% significance; z ratios in brackets.