Demand Curve under Monopolistic Competition
Under monopolistic competition, a large number of monopolists compete with each other. So each firm faces a downward sloping demand curve. It means a firm can sell more only by reducing the price of the product. However, here the demand curve of an individual firm is relatively more elastic. This is because the products are close substitutes. A fall in price of one product attracts easily the customers from other products. This increases demand more than a given fall in price.
A hypothetical demand curve DD1 of a firm operating under monopolistic competition has been drawn in the above figure. The firm can sell OQ1 amount of the good at price OP1 per unit. To sell OQ2 units the firm has to reduce the price to OP2. A slight fall in price brings a considerable increase in quantity demanded.