Historical variation in drug use trajectories across the transition to adulthood: the trend toward lower intercepts and steeper, ascending slopes | Survey Research Center

Schulenberg, John E; O’Malley, Patrick M; Bachman, Jerald G; Jager, J. (2013). Historical variation in drug use trajectories across the transition to adulthood: the trend toward lower intercepts and steeper, ascending slopes. Development and psychopathology. 25(2), 527-543.