The focus of this special section of Addictive Behaviors is on how new trends in substance use have a broader impact on youth development, most notably on the use of other substances or psychosocial functioning. These eight articles focus on recent changes in the prevalence of e-cigarettes, stimulants, and prescription opiates as well as the implications of changing legislation for recreational marijuana use. These studies also focus on how using these substances is associated with continued use of the same and other forms of drugs, advertising trends, and psychosocial functioning. This editorial summarizes these articles and offers key directions for future research.
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