But they did zero in on movies by controlling for a wide range of extenuating factors, including race, household income, school performance, parenting styles, smoking among friends and family members, and even personality traits such as rebelliousness.

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Often, they are on performance-related pay schemes, schooling their staff in what colours and styles of clothing are in fashion and how to sift out treasures that might sell well at auction.

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He says young people embrace visual stimulation, the fusion of different musical styles and experiences that are shorter and more intense than a two-hours-plus orchestral performance.

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