An industry is defined as a natural monopoly when economies of scale are sufficient to support only one firm, rendering market entry by competitors economically inefficient due to the impossibility of achieving average costs lower than incumbents under split demand. Within microeconomic theory regarding imperfect competition, monopolies inherently lack allocative and productive efficiency because profit-maximizing output (where marginal revenue equals marginal cost) diverges from socially optimal or efficient production levels where price equals marginal cost or average total cost is minimized. Theoretical analysis further posits that while monopolistic inefficiency typically restricts output to raise prices, the concentration of economic profits can theoretically facilitate substantial research and development investment and innovation compared to perfect competition structures.
An industry is defined as a natural monopoly when economies of scale are sufficient to support only one firm, rendering market entry by competitors economically inefficient due to the impossibility o…