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Total Revenue
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the amount a firm receives from the sale of its output
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Total Cost
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the market value of the inputs a firm uses in production (FC + VC)
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Explicit Cost
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require an outlay of money, e.g., paying wages to workers
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Implicit Costs
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do not require a cash outlay, e.g., the opportunity cost of the owner's time
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Accounting profit
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total revenue minus explicit costs
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Economic Profit
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total revenue minus total costs (including explicit and implicit costs)
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Production Function
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shows the relationship between the quantity of inputs used to produce a good and the quantity of output of that good (the relationship between inputs and outputs)
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Marginal product
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the increase in output arising from an additional unit of that input, holding all other inputs constant
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Marginal Cost
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is the increase in Total Cost from producing one more unit
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Fixed Cost
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do not vary with quantity of output produced
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Variable Costs
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vary with the quantity produced
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Average Total Cost
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equals total cost divided by the quantity of output
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Shutdown
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a short-run decision not to produce anything because of market conditions
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Exit
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A long-run decision to leave the market
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Sunk Cost
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a cost that has already been committed and cannot be recovered
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Monopoly
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a firm that is the sole seller of a product without close substitutes
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Market Power
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the ability to influence the market price of the product it sells
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Barriers to Entry
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other firms cannot enter the market
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Natural Monopoly
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a single firm can produce the entire market quantity (Q) at a lower cost than could several firms
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Increasing Q has two effects on revenue:
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Output effect: higher output raises revenue
Price effect: lower price reduces revenue
Price effect: lower price reduces revenue
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Price Discrimination
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selling the same good at different prices to different buyers
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Willingness to Pay (WTP)
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the maximum amount that a buyer will pay for a good
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Perfect Price Discrimination
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the monopolist produce the competitive quantity, but charges each buyer their WTP
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Oligopoly
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only a few sellers offer similar or identical products
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Monopolistic competition
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many firms sell similar but not identical products
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Concentration Ratio
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the percentage of the market's total output supplied by its four largest firms
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Game Theory
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the study of how people behave in strategic situations
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Duopoly
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An oligopoly with only two firms
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Collusion
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an agreement among firms in market about quantities to produce or prices to charge
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Cartel
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a group of firms acting in unison
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Nash Equilibrium
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a situation in which economic participants interacting with one another each choose their best strategy given the strategies that all the others have chosen
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Dominant Strategy
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a strategy that is best for a player in a game regardless of the strategies chosen by the other players
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Prisoner's Dilemma
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a particular "game" between two captured prisoners that illustrates why cooperation is difficult to maintain even when it is mutually beneficial
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"Tit-for-tat"
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whatever your rival does in one round(whether renege or cooperate), you do in the following round