This study presents panel-based evidence on the overall traffic fatality consequences of recent changes in state gasoline taxes. Our results suggest that plausibly exogenous increases in state gasoline taxes are associated with fewer traffic fatalities. (January 2006)
David C. Grabowski
Economics Letters
2006
D.C. Grabowski and M.A. Morrisey
http://econpapers.repec.org/article/eeeecolet/v_3a90_3ay_3a2006_3ai_3a1_3ap_3a51-55.htm