Which of the following conditions is characteristic of a monopolistically competitive firm in short-run equilibrium?Group of answer choicesMR > MCP = MCP = ATCMR = MC

The characteristic condition of a monopolistically competitive firm in short-run equilibrium is MR = MC (Marginal Revenue equals Marginal Cost).

Here's why:

1. In the short run, firms maximize their profits by producing up to the point where Marginal Cost (MC) equals Marginal Revenue (MR). This is the profit-maximizing rule for all firms, regardless of the market structure.

2. In a monopolistically competitive market, firms have some degree of market power, which means they can set their own prices to some extent. This is why the MR curve is downward sloping.

3. However, because there are many firms in the market producing differentiated products, the firm faces a downward-sloping demand curve. This means that to sell more units, the firm must lower its price.

4. Therefore, in the short run, the firm will increase production up to the point where the additional cost of producing one more unit (MC) equals the additional revenue gained from selling that unit (MR).

5. If MR > MC, the firm can increase profits by producing more. If MR < MC, the firm can increase profits by producing less. Therefore, the profit-maximizing level of output is where MR = MC.

6. Note that this condition does not guarantee that the firm is making profits. Whether the firm is making profits, breaking even, or incurring losses depends on the relationship between price (P), average total cost (ATC), and the level of output.