ECON 1B03 Lecture Notes - Lecture 7: Economic Surplus, Deadweight Loss, Competitive Equilibrium

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ECON 1B03 Full Course Notes
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ECON 1B03 Full Course Notes
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Consumer surplus (everything under the demand curve) = value to buyers - amount buyers pay. Producer surplus (everything above the supply curve) = amount sellers receive - cost to sellers. Since amount buyers = amount sellers receive. Total surplus = consumer surplus + producers surplus. Total surplus = value to buyers - cost to sellers. Allocate the supply of goods to the buyers who value them most highly (have the highest willingness-to-pay. Allocate the demand for goods to the producers who can produce them at least cost. Produce the quantity of goods that maximizes the sum of consumer and producer surplus. In other words, the big total surplus triangle can"t be any bigger than it is when the market is equilibrium. Total surplus is maximized at the perfectly competitive equilibrium. Whenever the market outcome is one of equilibrium, total surplus (as we just sww) is maximized. But it"s not always the case that the market is in a competitive equilibrium.

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