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BTS Home > Publications > Journal of Transportation and Statistics > Volume 5 Number 1 > Paper 4
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Table 2 - One-Way SUR Model for Per Capita Retail Sales

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  Initial specification Final specification
Coefficient t-stat Coefficient t-stat
CONSTANT 5.48E+05 8.15 5.34E+05 8.92
STATE SALES PERCAP 1.46E+00 5.18 1.52E+00 5.76
YEAR -2.85E+02 -8.05 -2.78E+02 -8.80
ELDERLY 1.58E+02 2.85 1.09E+02 2.32
UNEMP RATE 1.74E+02 2.12 1.21E+02 1.74
INCOME PERCAP 6.94E-01 5.19 6.49E-01 5.13
LARGECITY POP/DIST 1.18E-01 3.15 1.14E-01 3.26
TOT TRAFFIC PERCAP 2.77E+03 12.10 2.80E+03 12.58
RELIEF ROUTE 5.04E+03 1.85 5.35E+03 4.67
NUM YEARS 4.23E+01 0.32    
NUM YEARS SQ -3.94E+00 -0.75    
TRAFFIC SPLIT -1.76E+04 -6.11 -1.72E+04 -7.34
DIST OLD 2.15E+02 0.92    
DIST RATIO -7.03E+02 -0.27    
ACCESS CONTROL 2.55E+02 0.30    
R2adj. 0.59   0.59  
σ2μ 3.31E+06   3.64E+06  
σ2ν 5.58E+06   5.47E+06  
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