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December 10, 2019 

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LIQUIDITY: The ease of converting an asset into money (either checking accounts or currency) in a timely fashion with little or no loss in value. Money is the standard for liquidity because it is, well, money and no conversion is needed. Other assets, both financial and physical have varying degrees of liquidity. Savings accounts, certificates of deposit, and money market accounts are highly liquid. Stocks, bonds, and are another step down in liquidity. While they can be "cashed in," price fluctuations, brokerage fees, and assorted transactions expenses tend to reduce their money value. Physical assets, like houses, cars, furniture, clothing, food, and the like have substantially less liquidity.

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PLANNING HORIZON:

Another term for the long-run average cost curve. The long-run average cost curve is termed the planning horizon or planning curve because it provides information that a firm can use to plan factory construction and expansion in the long run.
A long-run average cost curve, or planning curve, is displayed in the exhibit below. This curve has the expected U-shape created by economies of scale (or increasing returns to scale) for small quantities of output and diseconomies of scale (or decreasing returns to scale) for large output quantities. Of note is that this long-run average cost curve is an envelope of several short-run average total cost curves.

Short and Long, Together

Long Run Average Cost
Long Run Average Cost

To see why the long-run average cost curve is termed a planning curve, a distinction between the short-run and long-run operation of firm is in order. Short-run operation requires that a firm decide the quantity of variable inputs it needs in order to produce a given output, given one or more fixed input. In other words, Waldo's TexMex Taco World must decide how many workers to employ and how much lettuce and sour cream to buy each day. But Waldo is not really concerned with the size of the restaurant for day-to-day operation. The restaurant is a given.

When Waldo expects limited business on the weekdays, he purchases small quantities of lettuce and sour cream and schedules only a handful of employees. However, when he expects to sell more on the weekends, he schedules more employees and purchases more lettuce and sour cream. In effect, Waldo is using a given short-run average and marginal cost curves such as the ones labeled SRATC(a) and SRMC(a) that can be revealed by clicking the button labeled [Short Run]. As demand (and price) change in the short-run, Waldo adjusts his output quantity based on his marginal cost.

However, even as Waldo makes these day-to-day decisions about short-run production, he has his eye on the long run. He has plans to buy additional capital equipment, add a few more tables and chairs, and expand the size of the restaurant. Even as Waldo schedules the number of employees to work next Thursday, he is also reviewing architectural plans for the new construction. Even as he orders extra boxes of lettuce for the weekend, he is making a decision between oak chairs or pine. In essence, a firm operates in both the short run and the long run simultaneous.

Long Run Adjustment

Waldo's long run plans are intertwined with his day-to-day operation. If a firm determines that day-to-day operations are straining the capacity of the fixed input, then it is likely to move ahead on plans to expand. Waldo, for example, realizes that his restaurant cannot service all of his potential customers. Every day, a line of customers extends out the door and circles the block. This is just the sort of thing that induces Waldo to expand his restaurant, to move from short run to the long run. In effect, Waldo is deciding if he should shift his current short-run cost curves from SRATC(a) and SRMC(a), to another set. Clicking the [Long Run Expansion] button reveals such a new set of curves, SRATC(b) and SRMC(b), associated with reducing the size of his restaurant.

However, if Waldo's restaurant is never more than half filled with day-to-day operations, then he might decide to remodel his existing place or move to a smaller one. Once again, Waldo intertwines the short run and the long run. In effect, Waldo is deciding if he should shift his current short-run cost curves from SRATC(a) and SRMC(a), to another set. Clicking the [Long Run Reduction] button reveals such a new set of curves, SRATC(c) and SRMC(c), associated with reducing the size of his restaurant.

<= PLANNED ECONOMYPLANT =>


Recommended Citation:

PLANNING HORIZON, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2019. [Accessed: December 10, 2019].


Check Out These Related Terms...

     | long-run total cost | long-run average cost | long-run marginal cost | economies of scale | diseconomies of scale | minimum efficient scale |


Or For A Little Background...

     | returns to scale | increasing returns to scale | decreasing returns to scale | long-run production analysis | short-run production analysis | long-run, microeconomics | short-run, microeconomics | average cost | opportunity cost | efficiency |


And For Further Study...

     | long-run average cost curve, derivation | long-run, macroeconomics | average total cost curve | law of diminishing marginal returns | U-shaped cost curves | opportunity cost, production possibilities |


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