Social learning theory has enjoyed decades of supportive research and has been applied to a wide range of criminal and deviant behavior. Still eluding criminological theorists, however, is a meaningful understanding of the causal processes underlying social learning. This lack of knowledge is due in part to a relative reluctance to examine value transmission as a process in the contexts of mentorship, role modeling, and social learning. With this empirical gap in mind, the present study seeks to isolate and classify meaningful themes in mentorship through loosely structured interviews with young men on the periphery of the criminal processing system. The purposive sample is drawn from youth in a Southwestern state, living in a state-funded, privately run group home for children of unfit, incarcerated, or deported/undocumented parents. The youth included in the study have recently passed the age of eighteen, and have elected to stay in the group home on a voluntary basis pending the completion of a High School diploma. Further, both the subjects and the researcher participate in a program which imparts mentorship through art projects, free expression, and ongoing, semi-structured exposure to prosocial adults. This study therefore provides a unique opportunity to explore qualitatively social learning concepts through the eyes of troubled youth, and to generate new lines of theory to facilitate the empirical testing of social learning as a process. Implications for future research are discussed.

Research on the consequences of gang membership is limited mainly to the study of crime and victimization. This gives the narrow impression that the effects of gang membership do not cascade into other life domains. This dissertation conceptualized gang membership as a snare in the life-course that disrupts progression in conventional life domains. National Longitudinal Survey of Youth Cohort of 1997 (NLSY97) data were used to examine the effects of adolescent gang membership on the nature and patterns of educational attainment and employment over a 12-year period in the life-course. Variants of propensity score weighting were used to assess the effects of gang joining on a range of outcomes pertaining to educational attainment and employment. The key findings in this dissertation include: (1) selection adjustments partially or fully confounded the effects of gang joining; despite this (2) gang joiners had 70 percent the odds of earning a high school diploma and 42 percent the odds of earning a 4-year college degree than matched individuals who avoided gangs; (3) at the 11-year mark, the effect of gang joining on educational attainment exceeded one-half year; (4) gang joiners made up for proximate deficits in high school graduation and college matriculation, but gaps in 4-year college degree and overall educational attainment gained throughout the study; (5) gang joiners were less likely to be employed and more likely to not participate in the labor force, and these differences accelerated toward the end of the study; (6) gang joiners spent an additional one-third of a year jobless relative to their matched counterparts; and (7) the cumulative effect of gang joining on annual income exceeded $14,000, which was explained by the patterning of joblessness rather than the quality of jobs. The theoretical and policy implications of these findings, as well as directions for future research, are addressed in the concluding chapter of this dissertation.

Most criminological theories are tested using samples of adolescents. Consequently, there is ample evidence regarding the correlates of criminal behavior committed by teenagers. The problem, however, is that there is relatively little information regarding the correlates of criminal offending committed during late life. This limits the ability to assess the generalizability of some of the leading theories in criminology. To fill this void in the literature the present study used a sample of 2,000 elderly people (i.e., 60 years of age and older) from Arizona and Florida to examine three issues: (1) the role of general and specific routine activity measures in the explanation of criminal activity in late life, (2) the invariance of low self-control across various subgroups of the elderly sample, and (3) the generality of self-control theory and routine activity theory. The analyses revealed several important findings. First, general routine activity measures are better predictors of general criminal offending than specific indicators. However, specific routine activity measures still matter in the explanation of specific types of crimes. Another important finding of this study was that low self-control has an invariant effect on criminal offending across gender, race/ethnicity, and age. Finally, self-control theory and routine activity theory are general frameworks that explain criminal behavior committed by older people in much the same manner as among teenagers. Routine activity does not mediate the link between low self-control and offending. Rather, both low self-control and routine activity exert independent effects on late life criminal activity, net of statistical controls. The present study concludes with a discussion of the findings situated in the literature and provides policy implications that stem from the results.

Frederic Thrasher's early work with youth gangs in Chicago continues to influence contemporary gang research. Thrasher's basic premise, that conflict with outside groups facilitates strong interpersonal ties between adolescents, has yet to undergo quantitative analysis. Using data from Wave II of the National Longitudinal Study of Adolescent Health ("Add Health"), this conflict is measured by the aggregate number of juvenile arrests for property and violent crimes in a community. Multivariate regression is conducted to explore the impact of police threat on number of friendship nominations, while logistic regression is conducted to see if police threat is impacting relationship strength between respondent's first male and female friend. The results from both the multivariate and logistic regressions do not support Thrasher's hypothesis. Implications for future research are discussed.

The link between victimization and offending is well established in the literature, yet an unexplored causal pathway within this relationship is concerned with why some individuals engage in maladaptive coping in response to victimization. In particular, those with low self-control may be attracted to problematic yet immediately gratifying forms of coping post-victimization (e.g., substance use), which may increase their likelihood of violent offending in the future. Using three waves of adolescent panel data from the Gang Resistance Education and Training (GREAT) program, this research examines: (1) whether individuals with low-self control are more likely to engage in substance use coping following violent victimization, and (2) whether victims with low self-control who engage in substance use coping are more likely to commit violent offenses in the future. The results from negative binomial regressions support these hypotheses, even after controlling for prior offending, peer influences, prior substance abuse, and other forms of offending. The implications for integrating general strain and self-control theories, as well as for our understanding of the victimization-offending overlap, are discussed.