At the end of the day, this begs the question: Is there room in the U.S. apparel industry for this type of growth, or is it a zero-sum game?

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Sure, China will continue to take over low-end manufacturing--these days it's busy destroying the Indonesian shoe sector--but this is not a zero-sum game.

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Though it may be an individual sport, parkour is neither a solitary activity nor a zero-sum game.

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But in Northern Ireland politics is seen as a zero-sum game: if one side gains, it stands to reason that the other must have lost.

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"The urban legend (that Facebook is losing younger users) flows more often than not from surveys people have done of younger users that indicate that they're using other social services ... much of the concern stems from the assumption that this is a zero-sum game, and that's not how we see it, " Ebersman said.

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It is a counsel of perfection, but unions' dealings with employers need not be a zero- or negative-sum game.

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Economics is not a zero-sum game as was once thought, though in many intellectual and political circles today it is still regarded as such.

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The second eternal truth: Success is not a zero-sum game, though most academic economists, pundits and politicians act as if it were--maybe because they vie for glory in zero-sum professions. (There can be only 1 U.S. President and 100 senators, for example.) The third eternal truth: The Golden Rule is more than a spiritual truth, it is a business truth.

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