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The consumer's surplus is highest at the largest number of units for which, even for the last unit, the maximum willingness to pay is not below the market price. Consumer surplus can be used as a measurement of social welfare, shown by Robert Willig. [8] For a single price change, consumer surplus can provide an approximation of changes in welfare.
Revealed preference theory, pioneered by economist Paul Anthony Samuelson in 1938, [1] [2] is a method of analyzing choices made by individuals, mostly used for comparing the influence of policies [further explanation needed] on consumer behavior.
In the case of two goods this function could be, for example, (,) = +. The quasilinear form is special in that the demand functions for all but one of the consumption goods depend only on the prices and not on the income. E.g, with two commodities with prices p x = 1 and p y, if
Allocative efficiency takes into account the preferences of the consumers and the efficient allocation of resources. Graphically this point is reached when price is equal to marginal cost. At this point there is no deadweight loss, and the social surplus (consumer surplus + producer surplus) is maximized.
The price that consumer is willing to pay is same as the marginal utility of the consumer. Allocative Efficiency example . From the graph we can see that at the output of 40, the marginal cost of good is $6 while the price that consumer is willing to pay is $15. It means the marginal utility of the consumer is higher than the marginal cost.
In practice, a consumer may not always pick an optimal bundle. For example, it may require too much thought or too much time. Bounded rationality is a theory that explains this behaviour. Examples of alternatives to utility maximisation due to bounded rationality are; satisficing, elimination by aspects and the mental accounting heuristic.
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In microeconomics and consumer theory, a Giffen good is a product that people consume more of as the price rises and vice versa, violating the law of demand. For ordinary goods , as the price of the good rises, the substitution effect makes consumers purchase less of it, and more of substitute goods ; the income effect can either reinforce or ...