. Author manuscript; available in PMC: 2010 Feb 16.

Published in final edited form as: Justice Q. 2007 Jun 1;24(2):271. doi: 10.1080/07418820701294813

Table 2.

Final intervention models by cause of death

Series	Final model	Parameter estimates
Homicide	Y_t = ω_o/_t	ω_o = 0.812; t = 1.68
	Q = 11.87; df = 12	p < .38
Alcohol	Y_t = ω_o/_t	ω_o = 1.730; t = 1.85
	Q = 18.08; df = 12	p < .12
Suicide	Y_t = (ω_o / 1 - δ₁B)(1 - B)/_t	ω_o = 5.343; t = 2.74
		δ₁ = 0.488; t = 1.95
	Q = 5.027; df = 11	p < .93

Note. ω_o = Zero-order input parameter of a transfer function. δ₁ = first-order output parameter of a transfer function. Q = test statistic for the null hypothesis that the model residuals are distributed as white noise. B = backward shift operator where B(Y_t) = Y_t-1. /_t = intervention series.