“…To be sure, investigations of co-offending do exist (see Carrington, 2002;Conway and McCord, 2002;McCord and Conway, 2005;Pettersson, 2003;Reiss, 1986Reiss, , 1988Reiss and Farrington, 1991;Sarnecki, 2001Sarnecki, , 2004Suzuki et al, 1994), but much of this literature offers aggregate statements about cross-sectional patterns or broad assessments of change across long time periods. In contrast, approaches that use individualized methods may shed unique insight on offending patterns over the criminal career (Maltz and Mullany, 2000;Nagin, 2005;Sullivan et al, 2006).…”