Commercial real estate demand is derived from activity in the overall economy.

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The demand for corn-derived ethanol has resulted in upward price pressure on certain foods.

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The software forecasts demand for specific products and stores derived from a database of sales history, broken into half-hour increments.

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More than half of the firm's revenues are derived from selling in rural India, where demand for its products is growing five times faster than in saturated urban markets.

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The logic behind this is derived from a theory called Ricardian equivalence, which holds that government spending cannot boost demand, since consumers cut their own expenditure in anticipation of higher taxes ahead.

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One big seller: the coal-derived carbon material that is used in the smelting of aluminum, which in turn is in strong demand in the airplane and construction industries.

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Meanwhile, foreign companies who have derived an increasing proportion of their sales and profits from the US market could also be hit by falling demand for their exports.

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