Question 1

What is imperfect competition in the context of IB DP Economics?

Accepted Answer

Imperfect competition refers to market structures that fall between perfect competition and monopoly. In the IB DP Economics curriculum, it includes monopolistic competition and oligopoly. These structures are characterized by firms having some market power, differentiated products, and barriers to entry, which affect pricing and output decisions.

Question 2

How does monopolistic competition differ from perfect competition?

Accepted Answer

In monopolistic competition, unlike perfect competition, firms sell differentiated products, which gives them some degree of market power to set prices above marginal cost. There are many sellers, but each has a small market share. This leads to non-price competition, such as advertising and product differentiation, which is not present in perfect competition.

Question 3

What role do barriers to entry play in oligopolistic markets?

Accepted Answer

Barriers to entry are crucial in oligopolistic markets as they prevent new firms from entering the market easily. This allows existing firms to maintain their market power and earn supernormal profits in the long run. Barriers can be in the form of high startup costs, economies of scale, or strong brand loyalty.

Question 4

Can you explain the concept of non-price competition in monopolistic competition?

Accepted Answer

Non-price competition in monopolistic competition involves strategies that firms use to differentiate their products and gain a competitive edge without changing the price. This includes advertising, improving product quality, and enhancing customer service. These strategies help firms attract and retain customers, thereby increasing their market share.

Question 5

What is the significance of the kinked demand curve in oligopoly?

Accepted Answer

The kinked demand curve model in oligopoly illustrates how firms might react to changes in a competitor's pricing. It suggests that if a firm raises its prices, others will not follow, leading to a loss of market share. Conversely, if a firm lowers its prices, competitors will match the price cut, resulting in a price war. This model explains price rigidity in oligopolistic markets, where firms prefer to compete on factors other than price.

Market Structure on Imperfect Competition II

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