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sunk cost
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past costs
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in constant return to scales...
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the long run average cost doesn't change
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economic costs equation
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explicit costs + implicit costs
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long run adjustments
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period long enough to adjust the quantities of all the resource that it employs
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total output equation
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total quantity / total product
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minimum efficient scale
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lowest level of output at which a firm can maximize long run average costs
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marginal product is the...
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output per unit of labor unit
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marginal product equation
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change in total product / change in labor input
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marginal cost equation
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change in total cost / change in quantity
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total cost equation
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total fixed cost + total variable cost
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total variable costs
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change with the level of output
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total variable costs examples
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payments for materials, fuel, power, transportation and labor
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diseconomies of scale
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difficulty of efficiently controlling/coordinating a firms operations
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economies of scale
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as size increases the # of factors will lead to decrease in average costs of production
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fixed costs
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do not vary with changes in output
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fixed costs still
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must be paid even if output is zero
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implicit costs
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opportunity costs
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"sunk cost fallacy"
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"get ones moneys worth"
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average total cost equation
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average fixed cost + average variable cost
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fixed cost examples
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rent payment, interest on firms debts, insurance premiums
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average variable cost equation
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total variable cost / quantity
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average fixed cost equation
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total fixed cost / quantity
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accounting profit equation
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total revenue - explicit costs
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accounting profit is...
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greater than economic profits and do not consider implicit costs
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economic profit equation
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total revenue - explicit costs - implicit costs
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if total product is increasing...
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marginal product is either increasing or decreasing
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average product is increasing then...
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average variable cost is decreasing
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average product is decreasing then...
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average variable cost is decreasing
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if one is producing no output then costs will be
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their fixed costs
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law of diminishing returns
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as a variable resource is added to a fixed resource, the marginal product of the variable resource will eventually decrease
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long run amount of calendar time
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varies from industry to industry
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when marginal product is increasing
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marginal cost is decreasing
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when marginal product is decreasing
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marginal cost is increasing
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marginal product of labor
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increase in output resulting from employing one more unit of labor
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as output increases the total variable cost
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increases at a decreasing rate and then at and increasing rate
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long run average total cost decreases as output increases due to
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economies of scale
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implicit costs are
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present but not obvious
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economic cost is a
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payment that must be made to obtain and retain services of a resource
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short run average variable costs are
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controlled and altered by changing production levels
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short run adjustment example
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hire extra workers or create more shifts
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long run adjustment example
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new production facility and more equipment
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normal profit
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typical "normal" amount of accounting profit that would likely been earned
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average product of labor equation
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total product / units of labor
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firms can't avoid paying
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fixed costs in the short run
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variable cost rises by
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increasing amount for each additional unit of output
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where marginal product exceeds average product
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average product rises
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when marginal product is less than average product
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average product declines
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where marginal product intersects average product
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average product is at maximum