This document contains testimony delivered to the Connecticut Judiciary and Appropriations Committees, on the economic impact of raising the age of juvenile jurisdiction from 16 to 18. The study finds that moving 16- and 17-year-old youth out of the adult system into the juvenile system, while maintaining all other services for youth as they are today, will return about $3 in benefit for every $1 in cost, assuming no new juvenile detention construction is required. If new construction is required, the transition of juveniles would result in slightly less than a $1 in benefit for every $1 in cost in the year the construction occurs, and $3 in benefit for every $1 in cost in subsequent years.