The program implementers confirmed that the number of youth eligible for the program exceeded program capacity by a factor of at least two. The sample size was limited to 2.5 times the number of spots in the program, for a total of 1500. In order to give all eligible youth an equal opportunity to participate, the program implementers determined entry into the program using a computerized randomization of eligible youth. Respondents were assigned to treatment and control using a randomization program coded in Stata. The sample was stratified by gender, "commander status," and community of registration.