ECON-221 Lecture Notes - Lecture 22: Deadweight Loss, Excise, Demand Curve

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11 Sep 2020
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Important concept: you can only get consumer surplus on units that you actually buy, cs is not the entire area under the demand curve. Important concept: the firm can only get producer surplus on units that it actually sells. Total surplus (or social welfare) measures the overall welfare of the society: total surplus= cs + ps. Consumers buy until their willingness to pay is equal to the market price: suppliers sell until their willingness to sell is equal to the market price. Efficiency: occurs when total surplus is maximized in a market. In free markets, both parties of self-interested individuals will benefit from trade. Equity asks: are the benefits divided fairly? (ex. Why do we pay taxes: pay for public goods, police, roads, schools, etc. Types of taxes: income, payroll, corportate, sales, excise, estate. A tax on a specific good: alcohol, tabacco, gasoline, for example. Tax incidence: refers to the party (consumers or producers) who bears the tax burden.

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