Economics Topic 5: Government's Microeconomic Objectives and Policy Notes - Objectives and Market Failure

Price Mechanism and Efficient Allocation of Resources

• The price mechanism functions in a free market through signalling, incentivising, and rationing to allocate scarce resources to produce goods and services based on market equilibrium.

• In an ideal perfectly competitive market, several assumptions must hold for the price mechanism to reach allocative efficiency:

  • There are many buyers and sellers.

  • Products are identical or homogeneous.

  • There are no barriers to entry and exit.

  • Perfect knowledge and information exist for all economic agents.

  • Factors of production exhibit perfect mobility.

  • There is an absence of externalities.

• These assumptions often break down in reality, leading to market failure where the free market fails to achieve an efficient allocation of resources.

Microeconomic Objectives: Efficiency and Equity

• Governments pursue two primary microeconomic objectives: efficiency and equity.

• There are three types of efficiency:

  • Allocative Efficiency: This is achieved when society produces and consumes the optimal mix of goods and services that maximises social welfare. In market terms, this occurs where Marginal Social Benefit equals Marginal Social Cost ($MSB = MSC$). This results in the socially optimum output level ($Q_s$).

  • Productive Efficiency: This occurs when society obtains the maximum output from its limited resources, typically associated with production at the lowest possible cost.

  • Dynamic Efficiency: This relates to improvement in goods and services quality and choice over time due to innovation.

• Equity: This refers to fairness in the distribution of essential goods and services (e.g., between rich and poor consumers). Inequity is considered a distributional issue and is not technically classified as a market failure in the same sense as inefficiency.

• Deadweight Loss: When output is not at the social optimum ($Q_s$) compared to the private market equilibrium ($Q_p$), a reduction in net benefit to society occurs, known as deadweight loss.

Market Failure and Its Causes

• Market failure occurs when the free market is unable to allocate resources efficiently, failing to produce at the socially optimal output ($Q_s$) and thus not maximising social welfare.

• Major causes of market failure include:

  • Non-provision of public goods.

  • Under-provision or over-provision of goods due to externalities.

  • Information failure (including imperfect perception and asymmetric information).

  • Factor immobility.

  • Market dominance.

Public Goods and Complete Market Failure

• Public goods possess three distinct characteristics:

  • Non-excludable: It is impossible or prohibitively expensive to exclude non-payers from consuming the good once it is provided. This leads to the free-rider problem where individuals have no incentive to pay, leading to zero effective demand and thus no price signal for producers.

  • Non-rivalrous: Consumption by one person does not reduce the amount available for others. This means the marginal cost of providing the good to an additional user is zero ($MC = 0$). Under allocative efficiency rules where $P = MC$, the price should be zero ($P = 0$), providing no revenue for firms to cover costs.

  • Non-rejectable: Consumers cannot refuse the consumption of the good once it is produced (e.g., national defence).

• Because there is no effective demand and no supply in the free market, there is non-provision ($Q_p = 0$), creating a "missing market" for goods that have positive social value (Q_s > 0).

Government Policies for Public Goods

• Direct Provision: The government uses tax revenue to finance and provide the good directly. For instance, the Ministry of Defence in Singapore manages the army. The government estimates $MSC$ and $MSB$ to provide at $Q_s$.

• Joint Provision: The government pays private firms to produce the public good. In Singapore, some basic research is subsidised because once published, it becomes non-rivalrous.

• Evaluation using the FIRST Framework:

  • Feasibility: Direct provision puts a strain on the government budget and incurs opportunity costs (e.g., education funds foregone).

  • Impediments: Imperfect information makes it difficult for the government to accurately determine $Q_s$ due to the lack of price signals.

  • Side Effects: Public sector managers may lack profit motives, potentially leading to productive inefficiency (not minimising costs).

Externalities

• An externality is a spillover cost or benefit borne by a third party who is not part of the economic transaction.

• Marginal Private Benefit (MPB): Benefit enjoyed by the individual consumer.

• Marginal Private Cost (MPC): Cost incurred by the individual consumer or producer.

• Marginal External Benefit (MEB): Spillover benefit to third parties.

• Marginal External Cost (MEC): Spillover cost to third parties.

• Relationships:

  • $MSB = MPB + MEB$

  • $MSC = MPC + MEC$

Positive Externalities (Under-allocation)

• Positive Externality in Production: Occurs when production creates benefits for third parties (e.g., Research and Development). $MSC = MPC$ and MSB > MPB. The market produces at $Q_p$ where $MPB = MPC$, but since Q_p < Q_s, under-allocation occurs, creating deadweight loss.

• Positive Externality in Consumption: Occurs when consumption benefits others (e.g., vaccinations). MSB > MPB creates a divergence. At $Q_p$, $MPB = MPC$, which is less than $Q_s$ where $MSB = MSC$. Deadweight loss is the area of forgone societal welfare.

Negative Externalities (Over-allocation)

• Negative Externality in Production: (e.g., coal-fired electricity causing air pollution). Third parties like farmers suffer costs ($MEC$). MSC > MPC; hence Q_p > Q_s, leading to over-production and deadweight loss.

• Negative Externality in Consumption: (e.g., smoking). Third parties suffer health costs from second-hand smoke. MSC > MPC; since Q_p > Q_s, social welfare is not maximised.

Government Policies for Externalities

• Subsidies: For positive externalities, a per-unit subsidy equal to $MEB$ at $Q_s$ is given so producers internalise the benefit. This shifts $MPC$ down to $MPC_1$, where market equilibrium moves to $Q_s$.

• Taxes: For negative externalities, a per-unit tax equal to $MEC$ is imposed. This shifts $MPC$ up to $MPC_1$, reducing quantity to $Q_s$.

• Legislation and Regulation:

  • Compulsory Education Act (2000): Mandates six years of primary education in Singapore to address positive externalities.

  • Smoking Prohibitions: Bans smoking in specific areas like the Orchard Road No Smoking Zone (ORNSZ).

  • Bans: Effective when $MEC$ is so large that $Q_s = 0$ (e.g., class A narcotics like heroin).

• Tradeable Permits: A "cap and trade" system where the government sets a total emission limit and issues permits. Firms that pollute less can sell permits to those that pollute more. This incentivises investment in cleaner technology.

• Public Education (Moral Suasion): Campaigns to raise awareness of actual costs/benefits to persuade agents to internalise externalities.

Information Failure Part 1: Perceived vs. Actual

• Information failure arises when agents lack critical information, leading them to under- or over-estimate actual private benefits/costs.

• Under-estimation of MPB: (e.g., cancer screenings). Consumers are unaware of the high survival rate benefits, so MPB_{perceived} < MPB_{actual}. This results in under-consumption and deadweight loss.

• Under-estimation of MPC: (e.g., cigarettes). Historical advertising misled consumers on the harm of smoking, so MPC_{perceived} < MPC_{actual}, leading to over-consumption.

• Policies:

  • Mandatory Labelling: Nutri-Grade labels for beverages in Singapore (effective December 30, 2022) to help consumers identify high-sugar content.

  • Plain Packaging: Required for tobacco in Singapore since July 1, 2020, with health warnings covering 75% of the package.

Information Failure Part 2: Asymmetric Information

• Asymmetric information occurs when one party in a transaction has more knowledge than the other, distorting incentives.

Adverse Selection (Hidden Characteristic)

• Occurs before the transaction.

• Informed Sellers/Uninformed Buyers: (e.g., the "Lemons" problem in used cars). Buyers, fearing a low-quality car, offer lower prices. Sellers of high-quality "peaches" leave the market as prices drop, leaving only "lemons." This can lead to a missing market for high-quality goods.

• Informed Buyers/Uninformed Sellers: (e.g., health insurance). High-risk individuals are more likely to buy insurance and may hide their health status. Insurance firms raise premiums, driving out healthy individuals and leaving only high-risk ones.

• Interventions:

  • Lemon Law (Singapore): Effective September 1, 2012, requiring businesses to repair/replace defective goods within six months of delivery.

  • Compulsory National Health Insurance: MediShield Life in Singapore pools risks across the entire population, preventing healthy individuals from opting out.

Moral Hazard (Hidden Action)

• Occurs after the transaction.

• Agents change behaviour because they do not bear the full cost of their actions (e.g., driving recklessly after getting full car insurance).

• Principal-Agent Problem: Doctors (agents) may induce demand for unnecessary treatments because patients (principals) lack medical knowledge and insurance covers the cost.

• Interventions:

  • Co-payments and Deductibles: Strategies requiring users to pay a share of costs. In Singapore, Integrated Shield Plans (IPs) require a 5% co-payment.

Factor Immobility

• Factor immobility is the inability of factors like labour and capital to move freely between markets, preventing the economy from reaching $Q_s$.

Occupational Immobility

• Mismatch between worker skills and producer requirements.

• Causes: Lack of skills/training or unwillingness to change environments.

• Policies: SkillsFuture in Singapore provides credits (e.g., $4,000 top-up for those aged 40+) and training allowances for reskilling.

Geographical Immobility

• Inability to move to different locations.

• Causes: High relocation costs, social/family ties, or housing shortages at destinations.

• Policies: Improving transport infrastructure (e.g., high-speed rail in China) or developing regional centres (e.g., Woodlands and Jurong in Singapore) with integrated housing.

Inequity and Income Inequality

• Equity is a normative concept regarding the fair distribution of resources.

• Income Inequality is measured by the Gini Coefficient (0 = perfect equality, 1 = perfect inequality). In 2023, Singapore's Gini was 0.433 (0.371 after taxes and transfers).

• Causes: Wage inequality driven by technological change (demand for high-skilled labour increases) and globalisation, as well as wealth inequality from capital assets like real estate.

• Market Impact: Effective demand in the free market reflects ability to pay, not society’s needs; thus, the poor are excluded from essential goods like healthcare.

Policies for Inequity

• Price Ceilings: Imposing maximum prices on essentials like rental housing to ensure affordability, though this can cause shortages and black markets.

• Indirect Subsidies: Lowering the price of necessities like food.

• Progressive Tax System: Higher marginal tax rates for high-income earners (e.g., Singapore's personal income tax brackets).

• Transfer Payments: Welfare payments like ComCare, Workfare Income Supplement (WIS), and the Community Care Endowment Fund.

• Minimum Wage: Setting a floor for wages to increase the purchasing power of low-income workers, which may carry the side effect of causing unemployment if set above the equilibrium.

Government Failure

• Government failure occurs when intervention results in greater inefficiencies or inequity than the free market would have produced (increasing deadweight loss).

• Causes of Government Failure:

  • Information Gaps: Inability to value externalities or determine consumer preferences accurately.

  • Time Lags: Recognition lags, implementation lags, and impact lags can make policies irrelevant by the time they take effect.

  • High Administrative Costs: Costs of monitoring and enforcement may exceed the benefits generated.

  • Rent-Seeking (Corruption): Officials may pursue uneconomic projects for private gain.

  • Policy Myopia: Politicians focusing on short-term solutions to win favour rather than long-term structural fixes.

Questions & Discussion

• MQ1 & MQ2: Is a lighthouse always a public good? Historically cited as one, but technological changes (GPS/encrypted signals) could theoretically make it excludable.

• MQ4: Are free government goods always public goods? No, items like healthcare or education are "merit goods"—they are excludable and rivalrous (private goods) but provided for free to achieve equity or efficiency.

• MQ8: Over-taxation occurs when the tax exceeds the $MEC$, leading to under-production where Q_{market} < Q_s, introducing a new deadweight loss.

• MQ15: Fraudulent accident claims (phantom drivers) are examples of moral hazard and asymmetric information where the agent exploits the insurer. Management involves strict legal penalties and verification protocols by the government and insurers.