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firm
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an organization that uses resources to produce a product, which it then sells
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total revenue
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Price x Quantity
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b cost
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whatever must be given up to obtain some item
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implicit costs
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opportunity costs
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explicit costs
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input costs that require an outlay of money by the firm
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fixed costs
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costs that remain constant as output changes
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economic profit
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total revenue - explicit costs - implicit costs
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accounting profit
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total revenue minus total explicit cost
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marginal cost
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the cost of producing one more unit of a good (change in variable cost)
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marginal revenue
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the additional income from selling one more unit of a good; sometimes equal to price
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variable cost
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a cost that rises or falls depending on how much is produced
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average variable cost
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variable cost divided by the quantity of output
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average fixed cost
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fixed cost divided by the quantity of output
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total cost
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fixed costs + variable costs
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average total cost
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total cost divided by the quantity of output
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accounting profit ignores what?
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implicit costs
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accounting profit is usually ______ in relation to the economic profit
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bigger
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diminishing marginal product
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the marginal product of an input decreases as the quantity of the input increases
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diminishing marginal returns
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a level of production in which the marginal product of labor decreases as the number of workers increases
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goal of a firm
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maximize profit
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perfectly competitive market
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(1) many buyers and sellers
(2) all firms selling identical products
(3) no barriers to entry
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profit maximizing quantity
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MR=MC (as long as marginal revenue exceeds marginal cost, increasing the qty produced raises profit)
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why does price curve = horizontal
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firms = price takers
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rules for profit maximization
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- if MR > MC , firms should increase output-if MC > MR, firms should decrease output- at profit maximizing level of output, MR = MC