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

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  Initial specification Final specification
Coefficient t-stat Coefficient t-stat
CONSTANT 1.32E+05 4.71 9.36E+04 4.05
STATE SALES PERCAP 7.68E-01 9.38 6.51E-01 9.61
YEAR -6.82E+01 -4.73 -4.85E+01 -4.09
YEAR 1982 -2.12E+01 -0.16 3.18E+01 0.24
ELDERLY 2.54E+01 1.56    
UNEMP RATE -3.06E+01 -1.12    
INCOME PERCAP 1.56E-01 3.89 1.53E-01 4.09
LARGECITY POP/DIST 3.50E-02 3.32 3.14E-02 3.32
TOT TRAFFIC PERCAP 3.97E+02 5.66 3.97E+02 5.89
RELIEF ROUTE -1.17E+03 -1.35 6.54E+02 1.77
NUM YEARS 2.53E+01 0.57    
NUM YEARS SQ -3.06E+00 -1.75 -1.52E+00 -2.96
TRAFFIC SPLIT -2.29E+03 -2.47 -1.51E+03 -1.96
DIST OLD 8.64E+01 1.18    
DIST RATIO 1.63E+03 1.97    
ACCESS CONTROL 1.71E+02 0.62    
R2adj. 0.66   0.65  
σ2μ 2.04E+05   2.29E+05  
σ2ν 8.23E+05   6.27E+05  
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