One of the primary entertainment trends of recent years -- and one with legs into the future -- can also be traced back 50 years.

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Market trends are divided into primary movements and secondary reactions.

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And Labour dismissed plans to reduce primary class sizes, saying that current trends already meant that an average of 25 would be achieved in the next few years.

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As for deteriorating trends on the desktop, he says the primary issue is a shift to mobile devices.

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