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average total cost
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what it costs to produce each unit on average TC/Q
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average variable cost
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what it costs to produce each unit on average in terms of the variable input costs on average
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marginal costs
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how much it costs to produce an additional unit
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marginal revenue
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the change in revenue from selling one more unit
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perfect competition
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a market structure with many buyers and sellers who are all price takers, produce a homogenous product, have perfect information, and face no barriers to entry or exit
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shut down price
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The price where average revenue is equal to average variable cost. Below this price, the firm will shut down in the short run
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cost-competitive industry
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a competitive industry where as entry occurs, exit stays constant
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increasing cost-competitive industry
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a competitive industry where as entry occurs faster, exit increases
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decreasing cost-competitive industry
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a competitive industry where as entry occurs faster, exit decreases
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monopoly
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a market structure where there is a single firm producing a unique product, imperfect information, and barriers to entry
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barrier to entry
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legal or technical reasons which prevent firms from entering a market
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natural monopoly
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a market where demand is insufficient to support more than one firm
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economies of scope
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when the costs of producing two goods together is less than the costs of producing them separately (i.e. chicken and steak dinners)
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cost complementaries
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as you produce more of 1 good, the marginal costs of the other goods decreases
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optimal price of a good
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the price at which the seller's profits are maximized
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monopolisitc competition
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many buyer and sellers, a slightly differentiated product, free entry and exit, and perfect information
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sweazy oligopoly
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oligopoly where firms believe rivals will match price decreases but not price increases
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cournot oligopoly
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oligopoly where each firm believes its rival will keep its output constant as it changes its own output
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Stackleberg oligopoly
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oligopoly where the leader uses the fringe's reaction function to choose its profit max level of output
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monopsony
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a single buyer in a market
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average product
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Q/L where the amount of output produced on average is by a specific type of input
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marginal product
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the additional output produced by an additional unit of an input
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variable market product (VMP)
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the benefit a firm receives from hiring an additional input = MPx price of the output
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marginal revenue product (MRP)
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the benefit a firm receives from hiring an additional input MR*MP
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isoquant
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the various combination of 2 inputs that can produce a given amount of output
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marginal rate of technical substitution
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the amount of 1 input that has to be given up to use 1 more of a different input, keeping output constant
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increasing returns to scale
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a 1% increase in all inputs results in a more than 1% increase in output
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constant returns to scale
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a 1% increase in all inputs results in a 1% increase in output
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decreasing returns to scale
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a 1% increase in all inputs results in a less than 1% increase in output