| Article ID: | iaor1989960 |
| Country: | United Kingdom |
| Volume: | 23 |
| Issue: | 3 |
| Start Page Number: | 309 |
| End Page Number: | 315 |
| Publication Date: | Sep 1989 |
| Journal: | Journal of Transport Economics and Policy |
| Authors: | Barmby Tim, Doornik Jurgen |
| Keywords: | statistics: distributions |
The Negative Binomial distribution, a generalisation of the Poisson distribution, is found to be useful in constructing a statistical model of trip frequency. It indicates that expenditure is a more important variable than the number of individuals in the household.