. Author manuscript; available in PMC: 2024 Sep 1.

Published in final edited form as: J Res Crime Delinq. 2022 Oct 11;61(2):224–267. doi: 10.1177/00224278221129886

Table 2c.

Coefficient Estimates of the Age-by-period Interaction Terms in the APC-I Model on Homicide Victimization by Race.

Black (M3)	Period

	1975–79		1980–84		1985–89		1990–94		1995–99		2000–04		2005–09		2010–14		2015–19
Age Group	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.
15–19	−0.601	^***	−0.514	^***	−0.095	^**	0.352	^***	0.328	^***	0.110	^***	0.202	^***	0.116	^***	0.102	^***
20–24	−0.323	^***	−0.295	^***	−0.139	^***	0.127	^***	0.188	^***	0.198	^***	0.139	^***	0.101	^***	0.004
25–29	−0.022		−0.046		−0.033		−0.091	^***	−0.045		0.125	^***	0.051	^*	0.059	^*	0.002
30–34	0.083	^**	0.110	^***	−0.006		−0.114	^***	−0.129	^***	−0.046		0.032		0.045		0.023
35–39	0.190	^***	0.174	^***	0.085	^**	−0.094	^***	−0.133	^***	−0.137	^***	−0.123	^***	−0.023		0.062	^*
40–44	0.311	^***	0.248	^***	0.112	^**	−0.048		−0.110	^**	−0.122	^**	−0.164	^***	−0.175	^***	−0.052
45–49	0.362	^***	0.321	^***	0.077		−0.131	^**	−0.099	^*	−0.128	^**	−0.138	^**	−0.122	^**	0.142	^**

White (M4)	Period

	1975–79		1980–84		1985–89		1990–94		1995–99		2000–04		2005–09		2010–14		2015–19
Age Group	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.	Coef.	Sig.
15–19	−0.187	^***	−0.206	^***	−0.160	^***	0.255	^***	0.289	^***	0.119	^***	0.116	^***	−0.101	^**	−0.126	^***
20–24	−0.136	^***	−0.100	^***	−0.043		0.072	^**	0.103	^***	0.154	^***	0.063	^*	−0.033		−0.080	^**
25–29	−0.030		−0.008		0.055	^*	−0.017		−0.042		0.045		0.014		0.005		−0.020
30–34	−0.020		0.012		0.028		−0.013		−0.041		−0.068	^*	−0.012		0.057		0.057
35–39	0.101	^***	0.059	^*	0.030		−0.063	^*	−0.069	^*	−0.075	^*	−0.095	^**	0.019		0.094	^**
40–44	0.139	^***	0.137	^***	0.046		−0.140	^***	−0.096	^**	−0.085	^*	−0.061		−0.003		0.063
45–49	0.135	^***	0.106	^**	0.044		−0.093	^**	−0.144	^***	−0.089	^*	−0.026		0.055		−0.013

Notes: All APC-I models are estimated with the sum-to-zero coding, under which the main effect is interpreted as the deviation from the grand mean and the interaction term as the deviation from the main effects.

p<.05

^**

p<.01

^***

p<.001.