In: Economics
Economies of scale refer to the cost advantage that a firm enjoys when the number of units produced is increased. It is the competitive advantage that large firms have over smaller ones. The advantage occurs since per unit fixed cost and units produced are inversely related. Increase in output lowers per unit fixed cost because fixed costs are now spread over more number of units produced. Average variable cost is also reduced because expanded scale of production increases production efficiency. This can be shown in the following graph:
The graph shows that when the firm increases its output from Q to Q2, the average cost of production falls from C to C1. Thus, the firm enjoys economics of scale up to the output level Q2.
When a firm starts producing large scale, it initially experiences increasing economies to scale, then stays constant for a while and then slowly decreases.
When a firm decides to produce at a large scale, the economies of scale can be categorized in two groups: