Monopolistic Competition

Imperfect Competition

Overview of Imperfect Competition

  • Two types of markets:
    • Monopolistically competitive markets
    • Oligopoly markets
  • Focus of this discussion: Monopolistic competition
    • To be discussed later: Oligopoly

Definitions and Characteristics

  • Imperfect Competition: Market structures that do not meet the criteria of perfect competition.
  • Monopolistically Competitive Market:
    • A competitive market featuring elements of monopoly.
    • Firms produce differentiated products (products that are not identical).
  • Oligopoly Market:
    • A market that is a monopoly with elements of competition.

Key Features of Monopolistic Competition

  • Hybrids: Monopolistically competitive firms exhibit characteristics of both monopolies and competitive firms.
  • Number of Sellers: Similar to perfect competition due to a large number of sellers.
  • Differentiated Products:
    • Unlike perfect competition (identical products), firms here produce unique products.
    • This differentiation enables firms to be price setters rather than price takers.

Demand Curve in Monopolistic Competition

  • Shape of Demand Curve:
    • The demand curve for a monopolistically competitive firm resembles that of a monopoly but is flatter due to the availability of substitutes.
    • Noted characteristics:
    • Demand curve for monopolist ($d_m$): Steeper due to no close substitutes.
    • Demand curve for monopolistically competitive firm ($d_{mc}$): Flatter due to availability of close substitutes.
  • Marginal Revenue:
    • Marginal Revenue (MR) for monopolist ($MRM$) and monopolistically competitive firm ($MR{MC}$) show similar trends.

Pricing Decisions in Monopolistic Competition

  • Price Setting:
    • Monopolistically competitive firms can influence prices within some range, unlike perfect competitors who are price takers.
  • Example of Differentiation:
    • Wendy's: Square hamburgers as a signature offering, differentiating from competitors.
    • McDonald's: Unique special sauce contributes to differentiation.
    • Arby's: Focuses on roast beef, diverging from typical hamburger offerings.

Short-Run Profit Maximization

  • Profit Maximization Condition:

    • Firms seek to maximize profits where Marginal Revenue equals Marginal Cost ($MR = MC$).

  • Steps to Determine Profit Maximization:

    1. Find optimal output quantity ($Q$) where $MR = MC$.
    2. Read the price from the demand curve at quantity $Q$.
    3. Determine Average Total Cost (ATC) at quantity $Q$.

  • Outcomes:

    • Breaking Even: Firm can earn a normal profit, covering total costs.
    • Losses: If ATC exceeds price, firm incurs losses but may remain open if price covers Average Variable Cost (AVC).

Staying Open Despite Losses

  • Conditions for remaining operational:
    • If price is above Average Variable Cost, a firm will continue operations even with losses in the short-run.
  • Significance of AVC:
    • If price falls below $AVC$, the firm will shut down regardless of the time frame (even in the short run).

Long-Run Outcomes

  • Entry and Exit:
    • The presence of low barriers to entry allows new firms to enter when existing firms earn abnormal profits.
  • Long-Run Equilibrium:
    • Unlike the short run, in the long run, firms in monopolistic competition will only break even, mirroring the outcome in perfect competition.
  • Conclusion:
    • In the short term, firms may experience profit, losses, or break-even; however, in the long run, firms settle at a break-even point due to competitive pressures and the ease of market entry and exit.