The Long-Term Effects of Time Use during High School on Positive Development.

This longitudinal study examines how the time that youth spend in activities during high school may contribute to positive or negative development in adolescence and in early adulthood. We draw on data from 1103 participants in the longitudinal Youth Development Study, followed from entry to high school to their mid-twenties. Controlling demographic, socioeconomic, and psychological influences, we estimate the effects of average time spent on homework, in extracurricular activities, and with friends during the four years of high school on outcomes measured in the final year of high school and twelve years later.