Goldstein Helmet Study

The Effect of Motorcycle Helmet Use on the Probability
of Fatality and the Severity of Head And Neck Injuries

Table III - Tobit Estimates of Head Injury Severity Model

Equation Constant H HI K1 K2 BA A EA EX o 1
3 -9.97* -17.24* 0.45 0.0016* 1.23* 0.13 -5.31** -0.068** 20.58 -1275.6
(-3.03) (-3.58) (0.95) (5.98) (4.48) (1.07) (-2.34) (-2.09)
4 -8.23** -17.34* 0.42 0.0010* 1.41* 0.12 -5.85* -0.057 20.83 -1279.5
(-2.54) (-3.58) (0.86) (5.123) (5.149) (1.02) (-2.56) (-1.76)
t Statistics in parenthesis
* Significant at 1% level
** Significant at 5% level