In economics, a cost curve is a graph of the costs of production as a function of total quantity produced. In a free market economy, productively efficient firms optimize their production process by minimizing cost consistent with each possible level of production, and the result is a cost curve. Profit-maximizing firms use cost curves to decide output quantities. There are various types of cost curves, all related to each other, including total and average cost curves; marginal ("for each additional unit") cost curves, which are equal to the differential of the total cost curves; and variable cost curves. Some are applicable to the short run, others to the long run.
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👉 Cost curve in the context of Natural monopoly
A natural monopoly is a monopoly in an industry in which high infrastructure costs and other barriers to entry relative to the size of the market give the largest supplier in an industry, often the first supplier in a market, an overwhelming advantage over potential competitors. Specifically, an industry is a natural monopoly if a single firm can supply the entire market at a lower long-run average cost than if multiple firms were to operate within it. In that case, it is very probable that a company (monopoly) or a minimal number of companies (oligopoly) will form, providing all or most of the relevant products and/or services. This frequently occurs in industries where capital costs predominate, creating large economies of scale in relation to the size of the market; examples include public utilities such as water services, electricity, telecommunications, mail, etc. Natural monopolies were recognized as potential sources of market failure as early as the 19th century; John Stuart Mill advocated government regulation to make them serve the public good.