Economic Definition of marginal factor cost and average factor cost. Defined.
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Term marginal factor cost and average factor cost Definition: The relation between marginal factor cost and average factor cost is comparable to other average-marginal relations found in the study of economics. For a firm that hires factors in a perfectly competitive factor market, marginal factor cost and average factor cost are equal, and equal to the factor market price. All three are represented by a horizontal, or perfectly elastic, curve equal to the factor market price. For a firm that hires factors in an imperfectly competitive factor market, especially monopsony, marginal factor cost is greater than both average factor cost and the factor market price.
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