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PERFECTLY ELASTIC: An elasticity alternative in which infinitesimally small changes in price cause infinitely large changes in quantity. In other words, quantity is hyper, super, infinitely responsive to price. Any change in price, no matter how small triggers an infinite change in quantity. Perfectly elastic should be compared with other elasticity alternatives--perfectly inelastic, relatively elastic, relatively inelastic, and unit elastic.
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                           AVERAGE TOTAL COST CURVE: A curve that graphically represents the relation between average total cost incurred by a firm in the short-run product of a good or service and the quantity produced. The average total cost curve is constructed to capture the relation between average total cost and the level of output, holding other variables, like technology and resource prices, constant. The average total cost curve is one of three average curves. The other two are average variable cost curve and average fixed cost curve. A related curve is the marginal cost curve. The average total cost curve is U-shaped. Average total cost is relatively high for small quantities of output, then as production increases, it declines, reaches a minimum value, then rises.Because average total cost is a combination of average variable cost and average fixed cost, the U-shape of the average total cost curve is a result of both underlying averages. At small production quantities, both average fixed cost and average variable cost decline, resulting in a negatively-sloped average total cost curve. However, because of the law of diminishing marginal returns, average variable cost eventually increases, which overwhelms the continuing decline of average fixed cost and results in a positively-sloped average total cost curve. | Average Total Cost Curve |  |
The graph to the right is the average total cost curve for the short-run production of Wacky Willy Stuffed Amigos (those cute and cuddly armadillos and tarantulas). The quantity of Stuffed Amigos production, measured on the horizontal axis, ranges from 0 to 10 and the average total cost incurred in the production of Stuffed Amigos, measured on the vertical axis, ranges from about $3 to over $8.As noted above, the average total cost curve is U-shaped. For the first 6 Stuffed Amigos, average total cost declines from over $8 to a low of $3. However, for the production beyond 7 Stuffed Amigos, average total cost increases. While it would be easy to attribute the U-shape of the average total cost curve to increasing, then decreasing marginal returns (and the law of diminishing marginal returns), such is not completely true. While the law of diminishing marginal returns is indirectly responsible for the positively-sloped portion of the average total cost curve, the negatively-sloped portion is attributable to increasing marginal returns, and perhaps more importantly to declining average fixed cost. The average total cost curve is most important to the analysis of a firm's short-run production when compared to the price. If price is greater than average total cost, then a firm receives economic profit on each unit of the output produced and sold. If price is less than average total cost, then a firm incurs a loss on each unit produced and sold. However, whether or not the loss is great enough to force the firm to shut down production depends on a comparison between price and average variable cost.
Recommended Citation:AVERAGE TOTAL COST CURVE, AmosWEB Encyclonomic WEB*pedia, http://www.AmosWEB.com, AmosWEB LLC, 2000-2025. [Accessed: July 2, 2025].
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Today, you are likely to spend a great deal of time visiting every yard sale in a 30-mile radius wanting to buy either super soft, super cuddly, stuffed animals or a large stuffed brown and white teddy bear. Be on the lookout for door-to-door salesmen.
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