For trade barriers are the combination of such tariffs and laws with transport costs.

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Others argue that workers with little education and few skills may be particularly badly hit by the combination of free trade and free labour markets.

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Over the last three years, success has been a matter of listening to the market and figuring out which combination of inflation and safety trade is calling the market correctly.

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The combination of forces in Congress against free trade, and many other sorts of internationalism, is stronger than it has been for years.

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Domestic demand was sleepy when consumer credit was unknown and a combination of a weaker currency and high barriers to trade made imports too expensive.

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That will take a combination of better economic policies in poor countries, more open trade regimes in rich ones, and aid flows that are not just higher but also better allocated.

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Charles Haddrell of New Zealand Trade and Enterprise, an economic-development agency, says it benefits from the combination of Pacific and urban cultures, an emphasis on natural fibres that appeal to environmentally conscious buyers, and a fresh and quirky approach.

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For instance, research-intensive universities might benefit most from a hybrid of renewable long-term contracts and fringe benefit trade-offs, whereas it may be most efficient for teaching colleges to utilize a combination of contingent faculty and renewable contracts.

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