3.7
Supply-side Policies
Market-based and interventionist supply-side policies — goals, tools, and effectiveness.
You should be able to
- State the goals of supply-side policies
- Distinguish market-based from interventionist supply-side policies
- Give examples of each type of policy
- Explain the demand-side and supply-side effects of fiscal policies
- Evaluate the effectiveness of supply-side policies
Note
This section is pending teacher review.
Goals of Supply-side Policies
Supply-side policies aim to increase the productive capacity of the economy — shifting the LRAS/PPC rightward. Specific goals include:
- Long-term growth through increasing the economy's productive capacity
- Improving competition and efficiency
- Reducing labour costs and unemployment through labour market flexibility
- Reducing inflation to improve international competitiveness
- Increasing firms' incentives to invest in innovation by reducing costs
Market-based Supply-side Policies
Market-based policies aim to reduce government intervention and let markets operate more freely — increasing efficiency and productive capacity.
Policies to encourage competition
- Deregulation: Remove government regulations that restrict competition or add costs to businesses
- Privatisation: Transfer state-owned enterprises to the private sector — private ownership creates profit incentives for efficiency
- Trade liberalisation: Reduce tariffs and barriers to international trade — increases competition and productive efficiency
- Anti-monopoly regulation: Break up monopolies or regulate market power to promote competition
Labour market policies
- Reducing union power: Limits on strikes and collective bargaining — aim to increase labour market flexibility and reduce wage rigidity
- Reducing unemployment benefits: Lower the "replacement rate" to increase incentives to seek work
- Abolishing/reducing minimum wages: Allow wages to fall to market-clearing levels
Incentive-related policies
- Personal income tax cuts: Increase after-tax return to work — incentivise labour supply and productivity
- Cuts in business tax and capital gains tax: Increase returns to investment — stimulate capital accumulation and R&D
Interventionist Supply-side Policies
Interventionist policies involve government action to directly improve the quantity and quality of factors of production:
| Policy | Rationale |
|---|---|
| Education and training | Increases human capital — raises productivity and addresses structural unemployment |
| Healthcare | Healthy workforce is more productive; reduces absenteeism and increases labour supply |
| Research and development (R&D) | Government subsidies or funding for R&D promote innovation and technological progress — shifts LRAS right |
| Infrastructure | Investment in transport, energy, communications, and sanitation reduces production costs and improves economic efficiency |
| Industrial policies | Government support for specific strategic industries (e.g., infant industry protection, sector support) |
Demand-side and Supply-side Effects of Fiscal Policies
Fiscal policy has both demand-side and supply-side effects:
- Tax cuts → increase disposable income (demand-side: C rises, AD shifts right) AND increase work and investment incentives (supply-side: LRAS shifts right)
- Investment in infrastructure → directly adds to government spending (demand-side: G rises, AD shifts right) AND increases productive capacity (supply-side: LRAS shifts right)
Effectiveness of Supply-side Policies
Strengths
| Type | Strength |
|---|---|
| Market-based | Improved resource allocation through competition; no burden on government budget |
| Interventionist | Direct support for sectors important for long-term growth; addresses market failures (externalities in education, R&D) |
Constraints
| Type | Constraint |
|---|---|
| Market-based | Equity issues — reducing benefits and minimum wages hurts low-income workers; time lags before structural changes have effect; vested interests resist deregulation; may increase environmental damage |
| Interventionist | High costs to government; significant time lags (education returns take years/decades); risk of government choosing wrong industries to support |
Key points to remember
- Supply-side policies: shift LRAS right → long-term growth, lower inflation
- Market-based: deregulation, privatisation, tax cuts, labour market flexibility
- Interventionist: education, healthcare, R&D, infrastructure
- Market-based equity concerns; interventionist cost and time lag concerns
- Fiscal policies have both AD and LRAS effects
Note
Practice questions are pending teacher review.
Practice Questions
1. Distinguish between market-based and interventionist supply-side policies. Give two examples of each.
Show answer
Market-based policies reduce government intervention and rely on market mechanisms to improve efficiency. Examples: (1) deregulation — removing regulations that restrict competition; (2) income tax cuts — increasing the financial incentive to work and invest. Interventionist policies involve direct government action to build productive capacity. Examples: (1) investment in education and training — raising human capital and reducing structural unemployment; (2) government funding of R&D — addressing the market failure of positive externalities in innovation.
2. Evaluate the effectiveness of investing in education as a supply-side policy to reduce unemployment.
Show answer
Strengths: Education investment increases human capital — better skills raise worker productivity and reduce structural unemployment by matching workers' skills to available jobs. It improves long-term economic growth potential (LRAS shifts right) and can reduce income inequality by improving opportunities for disadvantaged groups. The positive externalities (social benefits exceeding private returns) justify government intervention.
Limitations: Very long time lags — training workers takes years and the full economic benefits may take a decade or more to materialise. It is expensive — a significant government budget commitment. Results depend heavily on quality of education and relevance of skills to labour market needs. It does not address cyclical unemployment (caused by lack of AD), only structural unemployment.
Limitations: Very long time lags — training workers takes years and the full economic benefits may take a decade or more to materialise. It is expensive — a significant government budget commitment. Results depend heavily on quality of education and relevance of skills to labour market needs. It does not address cyclical unemployment (caused by lack of AD), only structural unemployment.