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The following article will guide you to know why cost curve is “U” shaped. The addition of fixed and Variable Cost gives us total costs, which when divided by the output give us Average Costs in the short period. The nature of short period Average Cost Curve is 'U' shaped. To begin with, the Average Costs are high at low levels of output because both the Average Fixed Costs and Average ...
In this case, the long-run average cost curve will be a horizontal straight line as depicted in Fig. 19.8. Though there will be infinite number of short-run average cost curves as we continue to assume that the size of the plant can be varied by infinitely small gradations, only sac curves of three plants have been shown in Fig. 19.8.
- Diagram of Marginal Cost
- Average Cost Curves
- Long Run Cost Curves
Because the short run marginal cost curve is sloped like this, mathematically the average cost curve will be U shaped. Initially, average costs fall. But, when marginal cost is above the average cost, then average cost starts to rise. Marginal cost always passes through the lowest point of the average cost curve.
ATC (Average Total Cost) = Total Cost / quantityAVC (Average Variable Cost) = Variable cost / QuantityAFC (Average Fixed Cost) = Fixed cost / QuantityThe long-run cost curves are u shaped for different reasons. It is due to economies of scale and diseconomies of scale. If a firm has high fixed costs, increasing output will lead to lower average costs. However, after a certain output, a firm may experience diseconomies of scale. This occurs where increased output leads to higher average costs. Fo...
- Choice of Production Technology. A firm can perform many tasks with a range of combinations of labor and physical capital. For example, a firm can have human beings answering phones and taking messages, or it can invest in an automated voicemail system.
- Economies of Scale. Once a firm has determined the least costly production technology, it can consider the optimal scale of production, or quantity of output to produce.
- Shapes of Long-Run Average Cost Curves. While in the short run firms are limited to operating on a single average cost curve (corresponding to the level of fixed costs they have chosen), in the long run when all costs are variable, they can choose to operate on any average cost curve.
- The Size and Number of Firms in an Industry. The shape of the long-run average cost curve has implications for how many firms will compete in an industry, and whether the firms in an industry have many different sizes, or tend to be the same size.
The shape of the long-run cost curve, as drawn in Figure 2, is fairly common for many industries. The left-hand portion of the long-run average cost curve, where it is downward- sloping from output levels Q 1 to Q 2 to Q 3, illustrates the case of economies of scale. In this portion of the long-run average cost curve, larger scale leads to ...
The shape of the long-run cost curve, as drawn in Figure 7.4b, is fairly common for many industries. The left-hand portion of the long-run average cost curve, where it is downward- sloping from output levels Q 1 to Q 2 to Q 3, illustrates the case of economies of scale. In this portion of the long-run average cost curve, larger scale leads to ...
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Mar 20, 2019 · Since long-run marginal cost (LMC) is the slope of the long-run average total cost, we can plot the long-run marginal cost curve as soon as we determine the long-run average cost curve. We need to obtain the first derivative of the LAC curve. Due to returns to scale and economies of scale, LAC curve is U-shaped.
