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economic cost
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both explicit and implicit (opportunity cost)
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opportunity cost
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the loss of the chance to get/make/buy/ do the next best thing
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explicit cost
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visible expenses; out of pocket
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implicit cost
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non-visible cost; opportunity cost
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normal profit
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the accounting profit earned when all resources earn their opportunity cost
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accounting profit
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total revenue minus total explicit cost
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economic profit
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total revenue minus total cost, including both explicit and implicit costs
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short run vs long run
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In the short run, wages and other prices are fixed, while in the long run, everything is variable
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total product
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total output produced by the firm
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marginal product
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the increase in output that arises from an additional unit of input
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average product
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total product/units of labor
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law of diminishing return
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at a point, adding more resources will decrease production
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fixed cost
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a cost that does not change, no matter how much of a good is produced
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variable cost
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a cost that varies with changes in the level of output
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average variable cost
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variable cost divided by the quantity of output
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average total cost
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total cost divided by the quantity of output
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marginal cost
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the cost of producing one more unit of a good
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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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economies of scale
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factors that cause a producer's average cost per unit to fall as output rises
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constant returns to scale
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the situation in which a firm's long-run average costs remain unchanged as it increases output
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diseconomies of scale
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increases in cost per unit when output increases
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Minimum Effiecent Scale
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the lowest level of output at which a firm can minimize long-run average total cost
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heterogeneous products
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each property has unique features
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un/differenciated products
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property does not have unique features
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price taker
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a firm that faces a given market price and whose quantity supplied has no effect on that price; a perfectly competitive firm
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profit maximazation
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MR=MC
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loss minimization
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in the short run the firm only have two choices, to produce or shut down
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shut down loss
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in short run when P < AVC
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long run supply curve
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possibility of firm entering or exiting market
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productive efficiency
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operating at lowest cost P=ATC min
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allocative efficiency
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P=MC