Industry studies often suggest that firms may have long-run average cost curves that show some output range over which there are economies of scale and a wide range of output over which
Economies of scale
Economies of Scale
Long-run Costs and Economies of Scale - SPUR ECONOMICS
Economics in Plain English » From short to long: Economies of scale and the long-run average total cost curve
Minimum efficient scale - Wikipedia
Economies of Scale and Introduction to Market Structures Lesson ppt download