Older Adult Multiple Segment Analysis

Research Question 3:  Does the offender age differ by victim-offender relationship for older adult and younger victims of robbery?   

The data source for this research question is the 1996 NIBRS hierarchical data file. There were 1,487 agencies in nine states reporting during 1996. The file used for the analysis of this question is an incident-level aggregated flat file, created by combining multiple segments of data. (See Creating an Incident-Level Aggregate Flat File for a detailed explanation of this process.)

Variables from the following segments were used: administrative, victim, offender, offense, arrest, and property. Although these six segments were used, not all variables from all segments were needed for this analysis. For this research question, the victim segment is matched to the offender segment to analyze the victim-offender interaction.

Table 3 shows the average age of offenders by relationship with their robbery victims.    The average age of offender varies by a few years or less between victim-offender relationships for victims under age 65 and victims aged 65 or older. The greatest difference, which is only 6.6 years, is for the victim-offender relationship of "known to victim," where the average offender age is 22.7 years for victims under the age of 65 and the average offender age is 29.3 years for victims age 65 or older.

Table 3.

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