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May 28, 2022 

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DISEQUILIBRIUM, AGGREGATE MARKET: The state of the aggregate market in which real aggregate expenditures are NOT equal to real production, which result in imbalances that induce changes in the price level, aggregate expenditures, and/or real production. In other words, the opposing forces of aggregate demand (the buyers) and aggregate supply (the sellers) are out of balance. Either the four macroeconomic sector (households, business, government, and foreign) buyers are unable to purchase all of the real production that they seek at the existing price level or business-sector producers are unable to sell all of the real production that they have available at the existing price level.

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SHUTDOWN RULE:

A rule stating that a firm minimizes economic loss by producing no output in the short run if price is less than average variable cost. This is one of three short-run production alternatives facing a firm. The other two are profit maximization (if price exceeds average total cost) and loss minimization (if price is less than average total cost but greater than average variable cost).
Production Alternatives
Price and CostResult
P > ATCProfit Maximization
ATC > P > AVCLoss Minimization
P < AVCShutdown
The shutdown rule applies to a firm that is incurring a short-run economic loss that exceeds total fixed cost. This occurs if the price received is less than average variable cost. It is not an absolute rule so much as it is an alternative that any profit maximizing firm is inclined to pursue given production cost and market conditions.

Shutting down is one of three short-run production alternatives facing a firm. All three are displayed in the table to the right. The other two are profit maximization and loss minimization.

  • With profit maximization, price exceeds average total cost at the quantity that equates marginal revenue and marginal cost. In this case, the firm generates an economic profit.

  • With loss minimization, price exceeds average variable cost but is less than average total cost at the quantity that equates marginal revenue and marginal cost. In this case, the firm incurs a smaller loss by producing some output than by not producing any output.
In the short run, a firm incurs total fixed cost whether or not it produces any output. As such, if the market price falls below average total cost, it must decide if the economic loss from producing the quantity of output that equates marginal revenue and marginal cost is more or less than the economic loss incurred with shutting down production in the short run (which is equal to total fixed cost).

Shutting Down
Shutting Down
The key criterion for this decision is price relative to average variable cost.

  • If price is less than average variable cost, a firm does not receive enough revenue to pay variable cost let alone any part of fixed cost. As such, the economic loss of operating is GREATER than total fixed cost. A firm is better off shutting down production in the short run, producing zero output, and awaiting a higher price.

  • If price is greater than average variable cost, a firm receives sufficient revenue to pay ALL variable cost plus some fixed cost. As such, the economic loss is LESS than total fixed cost. A firm is better off producing the quantity that equates marginal revenue and marginal cost than producing no output, receiving no revenue and incurring a loss equal to total fixed cost.
The exhibit here illustrates the shutdown situation that exists for a hypothetical perfectly competitive firm, Phil the zucchini-growing gardener. The going market price (marginal revenue) of $2 per pound of zucchinis received by Phil, intersects the marginal cost curve at less than the average variable cost curve.

Because price falls short of average variable cost, Phil incurs a loss. However, because the price is less than average variable cost, Phil incurs a smaller loss by shutting down production and incurring the loss of total fixed cost, than by producing any output.

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Recommended Citation:

SHUTDOWN RULE, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2022. [Accessed: May 28, 2022].


Check Out These Related Terms...

     | loss minimization rule | profit maximization | breakeven output | short-run production alternatives |


Or For A Little Background...

     | average variable cost | marginal cost | marginal revenue | average total cost | total fixed cost | average revenue | economic profit | U-shaped cost curves | profit |


And For Further Study...

     | perfect competition, profit maximization | perfect competition, loss minimization | perfect competition, shutdown | perfect competition, short-run supply curve | perfect competition, demand | perfect competition, short-run production analysis | perfect competition, long-run production analysis | perfect competition, efficiency | perfect competition, total analysis | perfect competition, marginal analysis | perfect competition, profit analysis | long run industry supply curve |


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