EC260 Lecture Notes - Lecture 2: Economic Surplus, Demand Curve, Supply And Demand

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Lesson 1. 2: consumer behaviour and rational choice: indifference curves and the marginal rate of substitution. Assume consumers are rational beings seeking to maximize individual well-being, which arises from goods individual chooses to purchase with available income. Indifference curves: maps out all market bundles that provide individual with same level of well-being such that individual/consumer is indifferent among which bundle they choose. Individual is equally well off at any points of the indifference curves. Indifference curves slope downwards to the right assumes individuals always prefer more of a commodity to less. Individual"s indifference curves can"t intersect one another if they did, it contradicts the assumption that individual always prefers more to less. Marginal rate of substitution: # of units of one product (y) that must be given up by consumer to receive additional unit of another product (x) while maintaining same level of well- being/satisfaction. Found by multiplying slope of indifference curve at given point by -1: utility maximization.

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