00:01
So in this problem, we need to establish how a firm participating in a perfectly competitive market determines its supply curve in the short run.
00:13
Remember that the supply curve for a firm tells us how many units of a product the firm is willing to sell at any given price.
00:21
Notice that the marginal cost curve for a firm in a perfectly competitive market tells us exactly the same thing.
00:28
The firm will produce at the level of output where marginal, revenue matches marginal cost because price equals marginal revenue for a firm in a perfectly competitive market so price is also the same as the marginal revenue in this type of market the firm will produce where price equals marginal cost so price is also matching marginal cost.
01:17
For any given price, we can then determine from the marginal cost curve the quantity of output that the firm will supply.
01:25
In other words, in a perfectly competitive market, the firm's marginal cost curve also represents its supply curve.
01:36
So the marginal cost curve is also representing our supply curve.
01:47
There is, however, an important point.
01:50
To this fact...