Typical firms in an industry can’t expect to produce economic profit in the long run when the industry has: (1) decreasing costs of production as the number of firms in the industry changes. (2) market demand exceeding the minimum average variable cost of production. (3) no barriers that preclude entry and exit in the long run. (4) increasing returns to scale of production across all feasible levels of output. (5) high marginal costs relative to its fixed costs.
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