Microeconomics Exam 2 Study Guide: Key Concepts and Applications

Price Control (Rent Control)

Overview of Price Controls

Price controls are government-imposed limits on the prices that can be charged for goods and services in a market. Rent control is a common example, often used to make housing more affordable.

• Causes Shortage: When prices are set below equilibrium, quantity demanded exceeds quantity supplied, resulting in shortages.

• Allocative and Productive Inefficiency: Allocative inefficiency occurs when resources are not distributed according to consumer preferences. Productive inefficiency arises when resources are not used in the most efficient way, often due to time wasted in search and other frictions.

• Black Markets, Quality, and Discrimination: Price controls can lead to black markets, reduced product quality, and discrimination in allocation.

• Policy Issues: Considerations include the impact on supply, demand, and market fairness.

Minimum Wage

Effects of Minimum Wage Laws

Minimum wage laws set a legal minimum for wages, aiming to protect workers but potentially causing market distortions.

• Surplus of Labor: Setting wages above equilibrium can lead to unemployment (surplus of labor).

• Allocative Inefficiency: Some workers are priced out of the market, leading to inefficiency.

• Policy Issues: Debates focus on balancing worker welfare with employment levels.

Applications of Surplus Analysis to Supporting Farm Incomes

Farm Income Support Policies

Governments often intervene in agricultural markets to stabilize farm incomes, using surplus analysis to evaluate policy effectiveness.

• Examples: Price supports, subsidies, and quotas.

• Policy Issues: Efficiency, equity, and market distortions.

Taxes

Tax Incidence and Efficiency

Taxes affect market outcomes by altering prices and quantities. Understanding who bears the tax (incidence) and the resulting inefficiency is crucial.

• Tax Incidence: Refers to who actually pays the tax—consumers or producers.

• Deadweight Loss: Taxes create allocative inefficiency, measured as deadweight loss.

• Types of Taxes: Marginal, average, progressive, regressive, and proportional taxes.

• Sources of Revenue: Federal, state, and local governments rely on various taxes for funding.

Formula for Deadweight Loss:

$DWL = \frac{1}{2} \times (P_{tax} - P_{eq}) \times (Q_{eq} - Q_{tax})$

External Effects (Externalities)

Understanding Externalities

Externalities are costs or benefits that affect third parties not directly involved in a transaction. They can be negative (pollution) or positive (education).

• Traditional Economic Theory: Marginal private cost vs. marginal social cost.

• Pigovian Modifications: Add marginal external cost to private cost to get social cost; add marginal external benefit to private benefit to get social benefit.

• Socially Efficient Outcome: Achieved when marginal social benefit equals marginal social cost.

• Examples: Taxes and subsidies to address deadweight loss, such as pollution taxes or subsidies for positive externalities.

Formula for Social Efficiency:

$MSB = MSC$

Coase Theorem

Negotiating Solutions to Externalities

The Coase Theorem states that if property rights are well-defined and transaction costs are low, parties can negotiate to resolve externalities efficiently.

• Assumptions: Clear property rights, low transaction costs.

• Applications: Pollution permits, tradable emissions allowances.

• Example: Electricity plant negotiations to reduce pollution.

Public Goods

Characteristics and Challenges

Public goods are nonrivalrous and nonexcludable, meaning one person's use does not reduce availability for others, and people cannot be excluded from use.

• Nonrivalry: Consumption by one does not affect others.

• Nonexcludability: Difficult to prevent non-payers from using the good.

• Free-Rider Problem: Individuals may benefit without paying, leading to under-provision.

• Efficient Provision: Determined by summing individual marginal benefits.

Quasi-public Goods and Common Resources

Intermediate Cases

Quasi-public goods and common resources share some but not all characteristics of public goods, often leading to overuse or under-provision.

• Examples: Toll roads, fisheries.

• Policy Issues: Regulation and management to prevent depletion.

Economics of Health

Health Care Organization and Outcomes

Health economics studies the organization, efficiency, and outcomes of health care systems.

• Basic Facts: Differences in health care and insurance across countries.

• Asymmetric Information: Adverse selection and moral hazard affect market outcomes.

• Readings: Differences in life expectancy, exposure to pollution, and income.

International Trade

Trade Theory and Policy

International trade is driven by comparative advantage and opportunity costs. Trade policies affect market outcomes and national welfare.

• Trade in Reality: Production possibility frontier (PPF) and opportunity costs.

• Comparative Advantage: Countries specialize in goods they produce most efficiently.

• Trade Restrictions: Tariffs, quotas, and export restraints.

• Arguments for Protection: National security, infant industry, dumping.

• Subsidies: Supporting domestic production through subsidies is often preferred over trade restrictions.

• Political Economy: Rational ignorance effect and other readings on protectionism.

Table: Types of Taxes

Type of Tax	Description	Example
Marginal Tax	Tax rate on the next dollar of income	Income tax brackets
Average Tax	Total tax paid divided by total income	Overall tax burden
Progressive Tax	Tax rate increases as income increases	Federal income tax
Regressive Tax	Tax rate decreases as income increases	Sales tax
Proportional Tax	Tax rate is constant regardless of income	Flat tax

Additional info: Some explanations and examples have been expanded for clarity and completeness.