Valentine’s work at MDRC focuses primarily on evaluations of programs that serve individuals in the criminal justice system, the juvenile justice system, and foster care. Currently Valentine has a central role in the evaluation of the Youth Villages Transitional Living Program, an intensive program for young adults transitioning out of the foster care or juvenile justice systems in Tennessee. She also has key roles in several prisoner and jail reentry program evaluations, including the National Institute of Justice’s Demonstration Field Experiment, the Reintegration of Ex-Offenders Random Assignment Evaluation (which tests programs that have received funding under the national Prisoner Reentry Initiative), and the Second Chance Act Evaluation (which tests adult prison and jail reentry programs). She is also a member of the impact team on the Youth Transition Demonstration, a six-site evaluation of employment services for young people with disabilities. Previously she worked on the Transitional Jobs Reentry Demonstration, a four-state evaluation of transitional jobs programs for men leaving prison, and the Enhanced Services for the Hard-to-Employ Evaluation, which tested service strategies for populations with barriers to employment. Valentine holds a PhD in sociology from Princeton University.