The following is a reply to Iqbal S. Bedi's article "An Evaluation of the Methodology and Results of J. P. Goldstein's Study, 'The Effects of Motorcycle Helmet Use on the Proba bility of Fatality and the Severity of Head and Neck Injuries. "'J. P. Goldstein's original article appeared in the...

This article evaluates the effectiveness of motorcycle helmets in accident situations. A latent variable model is developed and estimated. It is concluded that (1) motorcycle helmets have no statistically significant effect on the probability of fatality; (2) helmets reduce the severity of head...