Table 6
Model estimates of revenue per shipment for specialized carriers

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Model estimates of revenue per shipment for specialized carriers


Table summary
This table displays the results of model estimates of revenue per shipment for specialized carriers model 1, model 2a and model 2b, calculated using coefficient, p-value, model 1, model 2a and model 2b units of measure (appearing as column headers).
  Model 1 Model 2A Model 2B
  coefficient p-value coefficient p-value coefficient p-value
Domestic  
Year 13 0.023 15 0.035 15 0.266
Distance 0.38 0.000 0.31 0.005 0.31 0.001
Distance x tonnes 0.07 0.000 0.08 0.000 0.08 0.000
Distance x tonnes x tonnes -0.0013 0.000 -0.0014 0.000 -0.0014 0.000
Distance x tonnes x year 0.0016 0.295 0.0014 0.411 0.0014 0.604
Distance x distance -0.0001 0.000 -0.0001 0.000 -0.0001 0.001
Intercept 222 0.000 213 0.000 213 0.000
Export  
Year 13 0.534 -1 0.959 -1 0.959
Distance 0.49 0.000 0.56 0.000 0.56 0.000
Distance x tonnes 0.07 0.000 0.07 0.000 0.07 0.000
Distance x tonnes x tonnes -0.0015 0.000 -0.0015 0.000 -0.0015 0.000
Distance x tonnes x year 0.001 0.240 0.002 0.140 0.002 0.302
Distance x distance -0.0001 0.001 -0.0001 0.001 -0.0001 0.003
Export binary 211 0.015 221 0.020 221 0.066
Import  
Year 9 0.790 17 0.666 17 0.716
Distance 0.75 0.000 0.75 0.001 0.75 0.006
Distance x tonnes 0.06 0.000 0.06 0.000 0.06 0.000
Distance x tonnes x tonnes -0.0019 0.000 -0.002 0.000 -0.002 0.000
Distance x tonnes x year 0.005 0.005 0.005 0.005 0.005 0.000
Distance x distance -0.0001 0.007 -0.0001 0.033 -0.0001 0.044
Import binary -58 0.700 -70 0.711 -70 0.751
  Model 1 Model 2A Model 2B
Diagnostic statistics  
Number of observations 260,947 260,947 260,947
F-statistics 132 101 122
R-squared 0.519 0.352 0.352
Note(s): 
For estimates in Models 1 and 2A, p-values are based on analytical, robust standard errors corrected for within-group (trucking firm) correlation. P-values in Model 2B are based on jackknife standard errors. Estimates in Model 1 include commodity fixed effects (using commodities classified under the Standard Classification of Transported Goods at the 5-digit level); estimates in Models 2A and 2B do not.
Source(s): 
Statistics Canada, Trucking Commodity Origin and Destination Survey, 2004 to 2009; and Bureau of Transportation Statistics, North American Transborder Freight Data, 2004 to 2009, and Commodity Flow Survey, 2007.
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