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Journal of Transportation and Statistics
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Volume 3 Number 3
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Paper 3
Table 5
Multinomial Logit Model for Vehicle Type Chosen for Trip by Driver
Dependent variable: vehicle type choice
Beta
SE
t
-stat
P-value
Constant
SUV
2.464
0.244
-10.108
0.000
Pickup
2.322
0.145
16.046
0.000
Minivan
2.687
0.183
14.653
0.000
Vehicle age
0.056
0.002
31.158
0.000
Age of traveler
SUV
0.077
0.012
6.550
0.000
Pickup
0.047
0.006
7.239
0.000
Minivan
0.112
0.008
13.575
0.000
Age2 of traveler
SUV
8.34E04
1.36E04
6.119
0.000
Pickup
5.71E04
7.04E05
8.111
0.000
Minivan
1.09E03
9.09E05
11.977
0.000
Male driver
SUV
0.550
0.048
11.401
0.000
Pickup
3.172
0.035
91.060
0.000
Minivan
0.411
0.035
11.806
0.000
Employed driver
SUV
0.119
0.071
1.685
0.092
Pickup
0.089
0.046
1.927
0.054
Minivan
0.330
0.048
6.824
0.000
Work trip
SUV
0.058
0.063
0.919
0.358
Pickup
0.359
0.042
8.549
0.000
Minivan
0.034
0.048
0.713
0.476
Recreational trip
SUV
0.056
0.059
0.947
0.344
Pickup
0.170
0.037
4.579
0.000
Minivan
0.032
0.041
0.773
0.440
Population density
SUV
8.37E06
5.34E06
1.567
0.117
Pickup
1.54E06
4.15E06
0.370
0.711
Minivan
1.66E06
3.75E06
0.443
0.658
Income per person
SUV
6.21E07
1.67E06
0.371
0.710
Pickup
6.29E06
1.40E06
4.509
0.000
Minivan
4.76E06
1.64E06
2.896
0.004
Weekend indicator
SUV
0.169
0.053
3.199
0.001
Pickup
0.046
0.033
1.387
0.166
Minivan
0.042
0.037
1.138
0.255
Vehicle occupancy
SUV
0.229
0.029
7.970
0.000
Pickup
0.449
0.020
22.796
0.000
Minivan
0.385
0.017
22.138
0.000
Trip length (min.)
SUV
0.40E03
0.17E02
0.228
0.820
Pickup
1.00E03
0.11E02
0.882
0.378
Minivan
0.51E02
0.13E02
3.866
0.001
Log-likelihood function
Constant only
36009.5
Convergence
27703.3
Pseudo
R
2
0.231
Number of observations: 50,865 vehicle trips