A Further Analysis of Provincial Trucking Regulation

John Palmer

Bell Journal of Economics, 1973, vol. 4, issue 2, 655-664

Abstract: Forcing what is essentially a hyperbolic relationship into a linear regression model can create a "hyperbolic bag." This bag takes on importance if it is systematically related to other variables in the regression model. For the case at hand, it appeared that using a linear model might overstate the effects of regulation on trucking rates because the provinces which regulate rates have either relatively short or relatively long average distances, while those which do not regulate rates have intermediate distances falling at the bottom of such a bag. The regression model was respecified to correct for this problem, and while the respecification appears unimportant, other questions are raised.

Date: 1973
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