Wages, Prices & Economic Fluctuations

TL;DR

This topic explores how wages and prices are set, their impact on firm decisions, and how these elements interact to create economic fluctuations like booms and recessions. We'll focus on how labor market dynamics, firm pricing strategies, and aggregate demand/supply contribute to these ups and downs. Understanding these connections is key to analyzing real-world economic events.

1. The Mental Model

Think of the economy as a big, interconnected machine where workers' wages influence firms' costs, which in turn affects the prices firms set. These prices, along with how many people have jobs and how much they earn, determine overall spending and production, creating a cycle that can either grow steadily or fluctuate.

2. The Core Material

This topic draws heavily from the CORE Microeconomics units, especially emphasizing Units 7 and 10 which cover labor markets, firms, and economic fluctuations.

Unit 6: The Firm: Owners, Managers, and Employees

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Firms operate to maximize profits. They hire employees, and the wage they pay is a significant cost. The firm's hiring decision depends on the marginal product of labor and the real wage. Higher wages (relative to productivity) can reduce hiring, impacting employment levels.

Unit 7: The Firm and Its Customers (High Focus)

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This unit is crucial. Firms with market power (not perfect competition) face downward-sloping demand curves and choose a price and quantity to maximize profits.
- Profit maximization: Occurs where Marginal Cost (MC) = Marginal Revenue (MR).
- Price-setting: Firms set a price above MC, creating a markup. The size of the markup depends on the elasticity of demand. Less elastic demand allows for a higher markup.
- Cost-plus pricing: A common strategy where firms add a markup to their average costs.
- Wages and prices: An increase in wages (a cost) will shift the firm's cost curves upwards, leading to higher prices if the markup percentage remains constant.
- The labor discipline model: Explains why firms pay more than the reservation wage. Workers exert effort to avoid job loss (due to employment rents).

Unit 9: The Labour Market: Wages, Profits, and Unemployment

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Here, we connect firm behavior to the aggregate economy.
- Wage-setting curve: Shows the real wage necessary at each level of economy-wide employment to incentivize workers to exert effort. It's upward-sloping because higher employment means a lower cost of job loss (easier to find another job), so firms must pay more to ensure effort.
- Price-setting curve: Shows the real wage paid when firms choose their profit-maximizing price. It's derived from firms' markups. A higher markup means a lower real wage for workers.
- Labor Market Equilibrium: Where the wage-setting curve and price-setting curve intersect, determining the equilibrium real wage and the equilibrium level of employment, which corresponds to cyclical unemployment (natural rate).

Unit 10: Markets, Unemployment, and Monetary Policy (High Focus)

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This unit ties everything together with economic fluctuations.
- Aggregate Demand (AD): Total spending in the economy. It influences firms' decisions on output and employment.
- The Multiplier Model: Explains how a change in autonomous spending (e.g., investment, government spending) leads to a larger change in aggregate output.
- Investment decisions: Firms invest based on expected future demand and profitability, which are often volatile, contributing to fluctuations.
- Consumption smoothing: Households try to keep consumption stable, but credit constraints and weak willpower can limit this, amplifying fluctuations.
- Inflation: A persistent increase in the general price level. It can be caused by upward shifts in the wage-setting curve (e.g., increased worker bargaining power, expectations of inflation) or downward shifts in the price-setting curve (e.g., increased markups, higher input costs).
- The Phillips Curve: Shows the short-run inverse relationship between unemployment and inflation. Lower unemployment leads to higher wages and thus higher inflation.
- Monetary Policy: Central banks use interest rates to influence AD. Lower rates stimulate investment and consumption, increasing AD and potentially reducing unemployment (but risking inflation).
- Supply Shocks: Events like oil price increases can shift the price-setting curve down (reducing real wages for workers, or raising unemployment for the same real wage), leading to higher inflation and lower output (stagflation).

graph TD
    A["Increase in Aggregate Demand (e.g., higher investment)"] --> B["Higher output and employment"]
    B --> C["Lower unemployment (firms hire more)"]
    C --> D["Workers have more bargaining power"]
    D --> E["Higher wages (wage-setting curve shifts up/along)"]
    E --> F["Higher production costs for firms"]
    F --> G["Firms increase prices (price-setting curve shifts down/along)"]
    G --> H["Higher inflation"]
    H --> I["Central Bank raises interest rates (monetary policy)"]
    I --> J["Reduces Aggregate Demand (dampens spending)"]
    J --> K["Lower output and employment, reduces inflation"]
    K --> L["Return to equilibrium or start of recession"]

Unit 13: Economic Fluctuations and Fiscal Policy

• Fiscal Policy: Government spending and taxation to influence AD. Can be used to stabilize the economy during recessions (e.g., increased government spending, tax cuts).
• Automatic stabilizers: Policies that automatically dampen fluctuations (e.g., unemployment benefits increase during recessions, supporting demand).

3. Worked Example

Imagine an economy is initially at labor market equilibrium. Now, there's a sudden, strong increase in consumer confidence leading to a surge in autonomous consumption.

1. Impact on Aggregate Demand (AD): The increase in consumer confidence boosts consumption, shifting the AD curve outwards.
2. Multiplier Effect: This initial boost in spending works through the multiplier, leading to an even larger increase in total output and income.
3. Firms' Response: Seeing higher demand, firms increase production and hire more workers to meet it. Unemployment falls.
4. Labor Market: With lower unemployment, workers have more bargaining power. They demand higher wages, and firms, to retain effort, agree to pay them (moving up the wage-setting curve).
5. Inflation: These higher wages increase firms' production costs. If firms maintain their markup, they pass these costs on as higher prices to consumers. The economy experiences wage-price spiral pressure and rising inflation.
6. Central Bank Reaction: Concerned about inflation, the central bank might respond by raising the policy interest rate. This makes borrowing more expensive, reducing investment and consumption, thereby shifting AD inwards to cool down the economy and bring inflation back to target.

4. Key Takeaways

• Firms set prices by adding a markup to their marginal costs, influenced by demand elasticity.
• Wages are determined by firm strategies to ensure worker effort (labor discipline) and worker bargaining power, which depends on unemployment.
• The wage-setting and price-setting curves determine the equilibrium real wage and level of employment in the labor market.
• Economic fluctuations arise from shifts in aggregate demand (consumption, investment) and supply (e.g., cost shocks).
• Higher aggregate demand typically leads to lower unemployment, but also to upward pressure on wages and prices (inflation).
• Central banks use monetary policy (interest rates) to manage aggregate demand and stabilize inflation and output.
• Fiscal policy (government spending, taxes) can also be used to stabilize the economy, particularly during recessions.

Common Mistakes to Avoid:
- Confusing a shift along the wage-setting or price-setting curve with a shift of the curve itself.
- Forgetting that the price-setting curve represents the real wage consistent with profit-maximizing prices, not just the price level.
- Assuming firms always operate under perfect competition, which would eliminate their ability to set prices above marginal cost.
- Neglecting the role of expectations in driving both consumption/investment decisions and inflation.
- Not understanding that an increase in wages doesn't automatically mean workers are better off if prices rise proportionally or more.

5. Now Try It

You're advising a policymaker. A major oil supply shock has just hit the economy, significantly increasing energy costs for firms.
Describe, step-by-step, the immediate short-run impact of this shock on firms' costs, prices, the labor market (wage-setting and price-setting curves), and inflation. Then, explain one policy option the central bank could use to address the situation and its likely trade-offs. What would success look like for this policy? (15 minutes)