Bureau of Transportation Statistics (BTS)
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Table 2
Estimated Discrete Choice Functions

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  MNL NMNL
Tree1 Tree2 Tree3 Tree4
Performance statistics          
Log likelihood -3,326.46 -3,326.10 -3,272.11 -3,325.52 -3,325.71
McFadden Rho-squared 0.4040 0.4041 0.4038 0.4042 0.4042
Correctly predicted (%) 58.746 58.746 58.705 58.746 58.746
Alternative specific variables          
Distance -0.37(-37.0) -0.80(-40.3) -0.37(-36.8) -0.35(-16.9) -0.38(-31.8)
TEUs per berth -2.05(-4.5) -4.37(-9.4) -1.55(-3.3) -1.95(-4.2) -2.09(-4.6)
TEUs per crane 4.01(6.5) 8.57(13.1) 3.70(5.5) 3.80(5.8) 4.08(6.5)
Ship calls -0.91(-7.0) -1.95(-14.0) -0.72(-5.0) -0.86(-6.2) -0.93(-7.1)
Usage factor -3.27(-3.7) -7.09(-8.0) -2.82(-3.2) -3.09(-3.5) -3.33(-3.8)
Routes 0.10(6.6) 0.22(13.2) 0.07(4.1) 0.10(5.9) 0.11(6.6)
Constant variables          
Chinese 1.13(23.9) 1.07(13.3) 11.33(12.8) 1.19(17.3) 1.18(17.7)
Dalian, Qingdao, other ports 0.74(0.8) 1.50(1.5) 0.69(0.7) 0.71(0.7) 0.76(0.8)
Tianjin, Qingdao -1.41(-1.4) -3.15(-3.2) -1.23(-1.3) -1.33(-1.4) -1.44(-1.5)
Shanghai, other ports 3.75(4.4) 7.91(9.0) 3.30(3.7) 3.55(4.1) 3.81(4.4)
Dissimilarity parameters          
Chinese 1.00 2.16(49.7)   0.93(1.2) 1.00
Non-Chinese 1.00 2.08(18.2)   1.00 1.06(1.2)
Dalian     9.10(7.6)    
Tianjin     12.20(7.0)    
Qingdao     3.82(7.0)    
Shanghai     12.7(30.0)    
Other ports     12.56(7.6)    

Note: Numbers in parentheses are t-statistics.