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Table 4 Estimated models for rural roads
From: A stated-preference study of the willingness-to-pay to reduce traffic risk in urban vs. rural roads
RURAL | Ordered probit | Random effects ordered probit | ||
|---|---|---|---|---|
Variables | Estimate | t value | Estimate | t value |
Intercept | 1.875 | 13.798 | 1.982 | −12.779 |
Travel cost (Euro) | −0.309 | −7.201 | −0.316 | −7.302 |
Travel time (min) | −0.022 | −8.781 | −0.022 | −8.822 |
Risk | −0.266 | −8.078 | −0.278 | −8.364 |
Chosen speed in Freeways* >120 kmh | −0.214 | −2.929 | −0.228 | −2.302 |
Accidents as driver in urban: >1 | −0.478 | −4.809 | −0.512 | −3.814 |
Involved in accident as driver | 0.487 | 5.316 | 0.520 | 4.217 |
Threshold parameters for index model | ||||
mu_1 | 0.847 | 8.448 | 0.892 | 8.474 |
mu_2 | 1.122 | 10.704 | 1.186 | 10.732 |
mu_3 | 1.976 | 17.769 | 2.096 | 17.560 |
mu_4 | 2.510 | 22.088 | 2.654 | 21.593 |
mu_5 | 3.167 | 26.899 | 3.333 | 26.039 |
Standard deviation of random effect | ||||
Sigma | 0.450 | 5.900 | ||
Summary statistics | ||||
Number of observations | 900 | 900 | ||
Initial log-likelihood | −1557.09 | −1557.09 | ||
Final log-likelihood | −1487.49 | −1478.37 | ||
AIC | 2998.98 | 2992.73 | ||