Question

In the​ short-run, firms in a monopolistically competitive market are making profits. Explain what will tend to happen to the market and the firms profits in the​ long-run.

Answer 1

In terms of production and supply, the “short run” is the time period when one factor of production is fixed in terms of costs while the other elements of production are variable. The most common example of this is the production of a good that requires a factory. If demand spikes, in the short run you will only be able to produce the amount of good that the capacity of the factory allows. This is because it takes a significant amount of time to either build or acquire a new factory. If demand for the good plummets you can cut production in the factory, but will still have to pay the costs of maintaining the factory and the associated rent or debt associated with acquiring the factory.

In the short run, a monopolistically competitive market is inefficient. It does not achieve allocative nor productive efficiency. Also, since a monopolistic competitive firm has powers over the market that are similar to a monopoly, its profit maximizing level of production will result in a net loss of consumer and producer surplus, creating deadweight loss.

Because of the possibility of large profits in the short-run and relatively low barriers of entry in comparison to perfect markets, markets with monopolistic competition are very attractive to future entrants.

In the long-run, a monopolistically competitive market is inefficient. It achieves neither allocative nor productive efficiency. Also, since a monopolistic competitive firm has power over the market that is similar to a monopoly, its profit maximizing level of production will result in a net loss of consumer and producer surplus.

In the long run, a firm in a monopolistic competitive market will product the amount of goods where the long run marginal cost (LRMC) curve intersects marginal revenue (MR). The price will be set where the quantity produced falls on the average revenue (AR) curve. The result is that in the long-term the firm will break even.