BTS | Table 2 Overview of the Significant Explanatory and Correction Variables for Each Dependent Variable

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BTS Home > Publications > Journal of Transportation and Statistics > Volume 9 Number 1 > Paper 6

Table 2 Overview of the Significant Explanatory and Correction Variables for Each Dependent Variable

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	LNACCKSI		LNACCLI		LNPERKSI		LNPERLI
	State space	Regression	State space	Regression	State space	Regression	State space	Regression
Laws
LAW0675	−0.132 (−3.31)	−0.135 (−3.82)	−0.062 (−2.13)	−0.070 (−2.40)	−0.180 (−4.07)	−0.159 (−4.24)	−0.109 (−3.35)	−0.120 (−3.75)
LAW0192		−0.062 (−1.87)	−0.063 (−2.17)	−0.071 (−2.50)	−0.087 (−2.09)	−0.076 (−2.11)		−0.064 (−2.03)
LAW1294	−0.109 (−2.72)	−0.105 (−3.12)			−0.104 (−2.50)	−0.093 (−2.57)
Weather conditions
QUAPREC			0.001 (4.12)	0.001 (4.71)			0.001 (3.85)	0.001 (4.39)
PDAYPREC		0.001 (3.34)	0.001 (2.60)	0.001 (2.84)	0.001 (4.04)	0.001 (4.02)	0.001 (2.69)	0.001 (2.88)
HRSSUN	0.000 (3.92)	0.001 (5.35)	0.001 (4.99)	0.001 (5.38)	0.001 (4.48)	0.001 (4.80)	0.000 (3.82)	0.000 (4.17)
PDAYFROST	−0.002 (−5.93)	−0.001 (−5.77)	−0.001 (−5.73)	−0.001 (−5.63)	−0.001 (−4.82)	−0.001 (−4.81)	−0.001 (−4.44)	−0.001 (−4.36)
PDAYTHUN			0.001 (2.12)	0.001 (2.06)			0.001 (2.03)	0.001 (1.93)
Economic variables
LNUNEMP					0.117 (1.69)
LNCAR					−0.078 (−2.11)
Correction variables
Jan-79	−0.553 (−10.02)	−0.574 (−12.05)	−0.456 (−10.02)	−0.441 (−10.40)	−0.558 (−9.72)	−0.550 (−10.75)	−0.464 (−9.51)	−0.458 (−9.97)
Jan-84							−0.450 (−9.28)	−0.449 (−9.87)
Jan-85	−0.277 (−5.04)	−0.282 (−5.85)	−0.2711 (−6.00)	−0.2852 (−6.80)	−0.297(−5.22)	−0.289 (−5.62)	−0.276 (−5.67)	−0.294 (−6.46)
Feb-97	−0.118 (−2.15)	−0.128 (−2.66)	−0.2033 (−4.50)	−0.2181 (−5.08)	−0.130 (−2.28)	−0.124 (−2.31)	−0.214 (−4.41)	−0.238 (−5.09)
Forecasting measure
MSE(12)	0.005	0.0046	0.0034	0.0052	0.007	0.0063	0.0036	0.0052

Note: Calculated ccording to the state space method and the regression model with ARMA errors, together with the coefficients and t−values (in parentheses) and the MSE values of the predictions for 2000.