Abstract It is shown that the residual distributions obtained from typical OLS household-based trip generation models do not comply with the assumptions inherent in the use of ordinary least-squares. In particular, heteroscedasticity is likely to occur invalidating the estimation of coefficient standard errors by OLS procedure. A typical trip generation model is examined and it is shown that the heteroscedasticity is related to a linear function of the independent variables in the model. A transformation is suggested which wouul appear to yield constant residual variance.
An examination of residual distributions in Ordinary Least Squares (OLS) household- based trip generation models
1975-11-05
6 pages
Article (Journal)
Electronic Resource
English
Transportation Research Record | 1997
|British Library Conference Proceedings | 1997
|Household and person trip generation models
TIBKAT | 1978
|Least-squares estimation of trip distribution parameters
Elsevier | 1974
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