The Determinants of Demand
By Jodi Beggs, About.com Guide
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Expectations as a Determinant of Demand
Today's demand can also depend on consumers' expectations of future prices, incomes, prices of related goods, and so on. For example, consumers demand more of an item today if they expect the price to increase increase in the future. Similarly, people who expect their incomes to increase in the future will often increase their consumption today.