In a new Research in Brief, authors Shelly Jackson and Thomas Hafemeister discuss findings from two NIJ studies of elder abuse in domestic settings. Compared to other areas of family violence, elder abuse has lagged in theory development and relied more on adapting existing theories from other fields. The authors describe the findings from the two studies in this context, emphasizing the importance of developing new theories of elder abuse and of looking critically at current theories to increase our understanding and guide future research.