Evaluating the effectiveness of policies related to drunk driving

New findings are presented on the effectiveness (in terms of fatal crash reductions) of state-level public policies related to drunk driving. Conventional estimates of policy effects might be biased because of the endogeneity of policies; this concern is addressed by analyzing the time pattern of policy effects with respect to the date of adoption. For the 0.08 BAC law, the results suggest that a bias upward exists, but the policy is still somewhat effective. Graduated licensing programs for young drivers and the Mothers Against Drunk Driving (MADD) organization are also evaluated for the first time in this type of analysis. The estimated time pattern of effects for graduated licensing suggest that its effects are also overstated in conventional analyses, but the policy is still effective for young drivers. The estimates for MADD do not imply an effect, but this result could be due to the crudeness of the variable used. © 2003 by the Association for Public Policy Analysis and Management.