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Total cost
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the opportunity cost of all inputs
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Total opportunity cost =
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explicit costs + implicit costs
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Explicit costs
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costs that require a money outlay (Maddie example singing business contract)
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Implicit costs
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costs that do not require a cash outlay
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Cost of financial capital
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important component of a firm's cost of production
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Profit =
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total revenue - total cost
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accounting cost includes:
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only explicit costs
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economic costs include:
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both explicit + implicit costs (they bring the negative report)
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Accounting profit tends to be
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higher than economic profit
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Accounting profit =
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TR - (C explicit costs)
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Economic profit =
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TR - (C explicit costs + implicit costs)
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Short run
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the time frame in which some inputs are fixed
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Examples of short run
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physical capacity, quantity of good produced by increasing or decreasing labor
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Long run
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the time frame in which all inputs are variable
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What can vary with output in the long run?
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physical capital and all other inputs
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A firm experiences economies of scale when
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the long-run average total cost falls as it increases production.
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A firm experiences constant returns to scale when
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it can increase production without changing long-run average total cost.
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A firm experiences diseconomies of scale when
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The long-run average total cost increases as it increases production.
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On the graph, to select the long run average total cost curve, you select the
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the point for each output level that corresponds to the lowest possible average total cost.
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The law of diminishing marginal product of labor is demonstrated by which of the following?
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Total output increases at a decreasing rate as you increase the quantity of labor.
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The marginal product of labor
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the change in output from hiring one additional unit of labor input
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Fixed input
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an input whose quantity is fixed for a period of time and cannot be varied
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Variable input
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an input whose quantity the firm can vary at any time
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Production function
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relationship between an input and output of a good, holding other inputs constant
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Marginal product
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The increase in output from an additional unit of an input
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MP of labor =
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quantity of output/labor
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MP is the slope of the...
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production function
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MP diminishes as the quantity of the input...
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increases
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Production function gets flatter with...
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additional input
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If capital fixed...
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the productivity of the workers is diminished
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Marginal cost
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The increase in total cost due to an additional unit produced
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Fixed Costs (FC)
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Costs that do not vary with the quantity of output produced
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Variable Costs (VC)
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Costs that vary with the quantity of output produced
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TC =
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VC + FC
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VC =
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TC -FC
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FC =
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TC - VC
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TC and VC
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Increase
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AFC =
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FC/Q
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AVC =
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VC/Q or ATC - AFC
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ATC
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TC/Q or AFC + AVC
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When MC is below ATC...
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ATC is falling
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When MC is above ATC...
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ATC is rising
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MC and ATC intersect at the...
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Minimum ATC
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Long-run ATC (LRATC) shows...
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the lowest ATC possible at each Q when firm has the time to change labor and capital
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Economies of Scale:
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ATC falls as Q increases
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Constant Returns to Scale:
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ATC remains constant as Q increases
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Diseconomies of Scale:
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ATC rises as Q rises