Monopolistic Competition

Monopolistic Competition

Monopolistic competition is a market structure between perfect competition and monopoly. Many firms, but differentiated products. This describes most consumer markets — from restaurants to clothing.

Characteristics

1. Many sellers:

   • Each firm has a small market share
   • The decisions of one have little effect on others
   • No strategic interdependence

2. Differentiated product:

   • Products are similar, but not identical
   • Differences: quality, design, location, brand, service
   • Each firm is a "monopolist" of its own variety

3. Free entry and exit:

   • No significant barriers
   • New firms can create a similar product

Firm Behavior

• Downward-sloping demand: thanks to differentiation, the firm is not a price taker. Reducing the price increases sales, but not indefinitely.
• Profit maximization: $MR = MC$, as in monopoly.
• Market power: is limited by the presence of substitutes. The more substitutes and the closer they are — the more elastic the demand.

Short-Run Equilibrium

• If $P > ATC$: the firm earns a profit.
• If $P < ATC$: the firm makes a loss, but continues if $P > AVC$.
• In the short run, both profit and loss are possible — depends on the positions of the curves.

Long-Run Equilibrium

• Free entry: if profit is positive — new firms enter with their differentiated products.
• Entry effect:
  • Demand for each firm's product shifts left (market share taken away)
  • Demand becomes more elastic (more substitutes)
• Entry continues until: $P = ATC$, economic profit $= 0$.

Long-run equilibrium conditions:

• $MR = MC$ (profit maximization)
• $P = ATC$ (zero economic profit)
• The demand curve touches ATC (does not cross)

Excess Capacity

Excess capacity: in long-run equilibrium, firms produce less than at the minimum of ATC. Reason: the demand curve is downward sloping. The point of tangency with ATC occurs to the left of the minimum.

Consequence:

• Output is not at minimum cost
• "Loss" of productive efficiency
• More firms, less output for each

Interpretation: this is the "price of variety." Consumers value choice — ready to pay for it through non-minimal costs.

Non-Price Competition

Since price competition is limited:

• Advertising: creating brand awareness, loyalty
• Quality: improving the product
• Service: additional services
• Design: aesthetic differentiation
• Innovation: new product variants

Advertising expenses: can be significant. The question is — do they create value or just redistribute market share?

For the Investor

Industry characteristics:

• Many small players
• Low entry barriers
• Differentiation — but imitable
• Normal profit in the long term

Strategy:

• Building a brand as a barrier
• Cutting costs
• Consolidation can create value

Examples: restaurants, beauty salons, small retail, local services.