Economies of Scale Will Create a Barrier to Entry in an Oligopoly

question 28

Multiple Choice

Economies of scale will create a barrier to entry in an oligopoly when

• A)a firm's minimum efficient scale occurs where long-run average total costs are constant.
• B)the typical firm's long-run average total cost curve reaches a minimum at a level of output that is a large fraction of total industry sales.
• C)the typical firm's long-run average total cost curve reaches a minimum at a level of output that is a small fraction of total industry sales.
• D)the industry's four-firm concentration ratio is less than 40 percent.