Unit 9 Monopolistic Competition

Unit 9: Monopolistic Competition

Overview

  • Focus on monopolistic competition in microeconomics.

Learning Objectives

  1. Understand product differentiation.

  2. Define criteria for monopolistically competitive markets.

Product Differentiation

  • Definition: Features distinguishing a firm's product from competitors'.

  • Key Sources of Differentiation:

    • Material or quality differences.

    • Brand reputation.

    • Location and convenience factors.

    • Transaction and switching costs.

    • Incomplete consumer information.

Monopolistic Competition

  • Characteristics:

    1. Many buyers and sellers; individual market influence is minimal.

    2. Sellers offer differentiated goods and have pricing power.

    3. Low barriers to entry and exit in the market.

Product Demand in Monopolistic Competition

  • Firms face downward sloping demand due to product differentiation.

  • Demand varies per firm based on its own market segment.

Perfect vs. Monopolistic Competition

  • Perfect Competition: Marginal Revenue (MR) = Market Price

  • Monopolistic Competition: MR ≠ Market Price

Profit Maximization in Monopolistic Competition

  • Firms act as price setters; to increase sales, they must lower prices.

  • Marginal Revenue is less than the price of the good.

  • For a linear demand curve, the MR curve's slope is double that of the demand curve.

Calculating Profits

  • Profit = Total Revenue - Total Cost

  • Profit situations:

    • When TR < TC: Negative profits.

    • When TR = TC: Breakeven.

    • When TR > TC: Positive profits.

Market Adjustments

  • Entering Market: New firms enter due to economic profits, reducing existing firms’ demand.

  • Exiting Market: Unprofitable firms exit, increasing demand for remaining firms.

Long-Run Outcomes

  1. Long-term equilibrium achieved when P = ATC (average total cost).

  2. Firms earn zero economic profit; average cost equals price, indicating market efficiency is not maximized (P > MC).

Welfare Effects

  • Prices in monopolistic competition are higher than in perfect competition, leading to:

    • Decreased consumer surplus.

    • Potential deadweight loss, as firms are less efficient compared to perfectly competitive markets.