Variable

Parameter Estimate

Heteroscedasticity Consistent

Standard Error

t Value

Prob. > |t|

Intercept

$30,015.41

$3635.03

8.26

<0.0001

Density

$0.00258

$0.00027

9.49

<0.0001

T

$2216.44

$161.56

13.73

<0.0001

ATSF

$1720.58

$10,938.65

0.16

0.8752

BN

($34,199.11)

$4841.11

−7.06

<0.0001

BNSF

$13,747.87

$5599.19

2.46

0.0147

CNW

($5241.90)

$4747.29

−1.10

0.2705

SP

$36,245.29

$5734.65

6.32

<0.0001

UP

($14,017.55)

$3361.63

−4.17

<0.0001

UP-CNW

$19,361.97

$4166.30

4.65

<0.0001

UP-SP

($23,783.66)

$5946.54

−4.00

<0.0001

CR

$37,732.86

$9703.98

3.89

0.0001

CSX

($10,486.91)

$6136.06

−1.71

0.0886

CSX-CR

$23,520.82

$5571.85

4.22

<0.0001

GTW

($117,880.62)

$4732.37

−24.91

<0.0001

GTC

$90,775.10

$3567.30

25.45

<0.0001

ICG

($77,296.90)

$4370.11

−17.69

<0.0001

NS

$16,218.45

$6465.38

2.51

0.0127

NS-CR

$8801.12

$5706.07

1.54

0.1242

SOO

($31,376.22)

$2243.78

−13.98

<.0001