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Average Total Cost (ATC)
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total costs divided by quantity of output
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Average Variable Cost (AVC)
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total variable costs divided by quantity of output
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Average-Marginal Rule
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When the marginal is above the average magnitude, the average rises; when the marginal is below the average, the average falls
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Fixed Cost (FC)
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the sum of the expenses of the firm that are stable and do not change with the quantity of a product that is produced and sold
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Marginal Cost (MC)
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the change in total costs associated with a one-unit change in output
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Specialization of Labor
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Focusing work effort on a particular product or a single task
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Diminishing marginal productivity/returns
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when an advantage is gained in a factor of production, the marginal productivity will typically diminish as production increases
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Revenue
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the income that a firm receives from the sale of a good or service to its customers
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short-run average cost (SRAC) curve
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the average total cost curve in the short term; shows the total of the average fixed costs and the average variable costs
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Total Cost (TC)
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total fixed costs plus total variable costs
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Variable Cost (VC)
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the sum of the expenses of the firm that vary directly with the quantity of a product that is produced and sold
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constant returns to scale
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when an increase in input results in a proportional increase in output
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diseconomies of scale
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when the long-run average total cost rises as the quantity of output increases
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economies of scale
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when the long-run average total cost falls as the quantity of output increases
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long-run average cost curve (LRAC)
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a curve that shows the lowest cost at which a firm is able to produce a given quantity of output in the long run, when no inputs are fixed (planning curve)