Socially+Efficient+and+Inefficient+Markets copy

Unit 6 - Topics 6.1.1, 6.1.2, 6.1.3

Social Efficiency

  • Definition: Social Efficiency occurs when resources are allocated efficiently.

  • Key Equation: Marginal Benefit (MB) = Marginal Cost (MC).

  • Internalizing Costs: When all costs are internalized, the Marginal Social Benefit (MSB) equals the Marginal Social Cost (MSC).

  • Economic Surplus: Total Economic Surplus is maximized when MSB = MSC.

Marginal Terms for Reference

  • MPC: Marginal Private Cost

  • MPB: Marginal Private Benefit

  • MSB: Marginal Societal Benefit

  • MSC: Marginal Societal Cost

  • Economic surplus maximization condition reasserted: MSB must equal MSC.

Recap: Perfect Competition Firm Conditions

  • In Product Market:

    • Price (P)

    • Marginal Cost (MC) = Price (P)

    • Average Total Cost (ATC)

  • In Labor Market:

    • Wage Rate

    • Marginal Revenue Product (MRP)

  • Variables:

    • Pf = Price from the firm

    • MR = Demand = AR = P

    • W = Marginal Factor Cost (MFC)

    • W = Marginal Revenue Product (MRP)

    • MRPL (Marginal Revenue Product of Labor) depicts relevant outputs

Recap: Total Economic Surplus in Product Market

  • Visual Representation:

    • Price (P)

    • Marginal Private Cost (MPC) = Marginal Social Cost (MSC)

    • Consumer Surplus (CS)

    • Equilibrium Price (Pe)

    • Producer Surplus (PS)

    • Marginal Private Benefit (MPB) = Marginal Social Benefit (MSB)

Market Failures

  • Definition: Situations where the allocation of goods and services is not efficient, leading to a loss of economic efficiency.

Causes of Market Failure

  1. Market Power:

    • Occurs in forms of monopoly, oligopoly, and monopolistic competition.

  2. Asymmetric Information:

    • Lack of information for sellers or buyers.

  3. Externalities:

    • Include negative and positive externalities in production and consumption.

  4. Public Goods:

    • Insufficient production of goods and services provided by the government.

Examples of Market Failure

  • Deadweight Loss: Visual representation showing inefficiencies on the graph.

Trade Barriers

  • Types: Tariffs or quotas that impact prices and quantities in markets.

  • Graphical Concept: Illustrates domestic supply and demand with effects of taxation on equilibrium.

Government Intervention

  • Purpose: To correct market failures and ensure social efficiency.

Subsidy

  • Definition: Used when there is under-allocation of resources.

  • Condition: Inefficient market produces less than socially optimal output (where price equals marginal cost).

  • Producers may exploit the market, leading to MR curve < D curve.

  • Effect of Subsidy: Lowers cost of production, shifts MC curve to the right towards optimal output.

Tax

  • Condition: Used when there is over-allocation of resources.

  • Inefficient market may produce greater than the socially optimal output (price < marginal cost).

  • Effect of Tax: Raises production costs, shifts MC curve to the left to reach optimal output.

Environmental Regulation

  • Pollution Abatement:

    • New technologies or government actions aimed at reducing pollution.