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Law of demand

35 bytes removed, 14:51, 7 May 2011
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! Context !! Verbal explanation !! More about phenomena
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| Single household, single good (seen in individual or household demand curve) || The quantity demanded for a particular household for a particular commodity good is expected to increase, or at least stay constant, as the price of the commodity good falls. This relies on the assumption that the marginal benefit from every additional unit of the commodity good is decreasing. There are two effects responsible for the law of demand: [[income effect]], which states that the higher the price, the less the household can spend on the good with the limited income it has, and the [[substitution effect]], which predicts that an increase in price makes the household substitute away from the good towards [[substitute goods]]. || [[Law of demand for individual buyers follows from diminishing marginal utility]], [[Income effect explains law of demand]], [[substitution effect explains law of demand]]
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| Aggregate of households, single good (seen in market demand curve) || The quantity demanded over an aggregate of households for a particular commodity good is expected to increase, or at least stay constant, as the price of the commodity good falls. This may happen because the consumption of individual households increases steadily, as well as because the number of households purchasing the commodity good also increases steadily, as the price falls to the reservation price. The second effect is due to differences in [[reservation price]]s across households. Note that this effect is operational even when there is essentially no scope for a single individual or household to buy more than one unit of the commoditygood. || [[Law of demand for multiple buyers follows from differences in reservation prices]]
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