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Following are excerpts from an April 20, 1999, conference convened by the Middle East Policy Council. The papers these presentations are drawn from will be published as a book, forthcoming in 1999.  相似文献   
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Using an integration of social control theory and the routine activity perspective, adolescent time use was examined for effects on problem behaviors. We examined a wide variety of time use categories, including homework, extracurricular activities, sports time, alone time, paid work, housework, television watching, as well as indices of family time and peer time, for their effects on heavy alcohol use, cigarette smoking, illicit drug use, delinquency and sexual activity. The study employed a representative household sample of adolescents (n=606) and took into account important sociodemographic factors – gender, age, race (Black and White), and socioeconomic status. The most important predictors of adolescent problem behaviors were family time and peer time. Family time serves as a protective factor against all five problem behaviors while peer time is a highly significant risk factor for all five problem behaviors. Ph.D. in Sociology from the University at Buffalo. She is a Senior Research Scientist at the Research Institute on Addictions, University at Buffalo, 1021 Main Street, Buffalo, The State University of New York 14203. Her research interests include family influences on the development of adolescent substance use, gambling, and other problem behaviors M.A. in Mathematics from the University of Rochester. He is Project Manager/Data Analyst at the Research Institute on Addictions, University at Buffalo, 1021 Main Street, The State University of New York 14203. His current research interests include advanced data analysis techniques for studies of alcohol, other substance use and gambling behaviors among youth and adults. Ph.D. in Psychology from the University at Buffalo. He is a Senior Research Scientist at the Research Institute on Addictions, University at Buffalo, 1021 Main Street, The State University of New York 14203. His research interests include the substance abuse/crime nexus, the epidemiology of substance abuse, and the etiology and epidemiology of pathological gambling. Ph.D. in Sociology from Yale University. He is Professor and Chair in the Department of Sociology, University at Buffalo, 430 Park Hall, Buffalo, The State University of New York, 14260. His research interests include interpersonal relations in adolescent, family, friendship, and work groups. M.S. in Epidemiology from the University at Buffalo. She is a retired Research Scientist from the Research Institute on Addictions, University at Buffalo, 1021 Main Street, The State University of New York 14203. Her research interests include alcohol and other substance use among adolescents and families  相似文献   
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正The popular toast, meaning empty glass, was uttered at least a dozen times each over the course of a 10-dish meal at a banquet in Xiamen, Fujian Province.  相似文献   
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