@article{ref1,
title="Traffic fatalities, Peltzman's model, and directed graphs",
journal="Accident analysis and prevention",
year="1999",
author="Roh, J. W. and Bessler, D. A. and Gilbert, R. F.",
volume="31",
number="1-2",
pages="55-61",
abstract="We show how statistical methods based on directed graphs may be useful in modeling traffic fatalities by comparing models specified using directed graphs to a model originally developed by Peltzman. The comparison uses Peltzman's original data, as well as up-dated data (and coefficients) through 1993. Out-of-sample forecasts of traffic fatalities from Peltzman's model are compared with those from a model constructed using directed graphs over data for the more recent period. The directed graphs model outperforms Peltzman's model in root mean squared forecast error.",
language="en",
issn="0001-4575",
doi="",
url="http://dx.doi.org/"
}