Policy Conflicts and Trade-Offs

Achieving macroeconomic objectives is complicated by the fact that policies designed to achieve one objective often conflict with other objectives. Governments and central banks face unavoidable trade-offs, and the art of economic policy lies in managing these tensions. This lesson examines the key policy conflicts, the theoretical frameworks for understanding them, and the implications for policy design.

Key Definition: A policy trade-off exists when the pursuit of one macroeconomic objective makes it harder to achieve another. For example, reducing inflation may require higher interest rates, which slow growth and increase unemployment.

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The Four Main Macroeconomic Objectives

Objective	Target/Indicator	UK Target (approximate)
Economic growth	Real GDP growth	Sustained, non-inflationary growth
Low inflation	CPI	2% (Bank of England target)
Low unemployment	Unemployment rate / claimant count	Full employment (no agreed numerical target)
Balance of payments equilibrium	Current account balance	Broadly sustainable position

Additional objectives include reducing inequality, fiscal sustainability (manageable national debt), and environmental sustainability — but the four above are the core A-Level objectives.

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The Phillips Curve

The Original Phillips Curve (1958)

A.W. Phillips (1958) published a landmark study examining the relationship between the unemployment rate and the rate of change of money wages in the UK from 1861 to 1957. He found a stable inverse relationship — when unemployment was low, wage inflation was high, and vice versa.

This was subsequently reinterpreted as a trade-off between unemployment and price inflation: governments could choose a point on the Phillips curve, accepting higher inflation in exchange for lower unemployment, or lower inflation at the cost of higher unemployment.

Policy Implication

If the Phillips curve is stable, governments face a menu of choice. They can use demand-side policies (fiscal or monetary expansion) to move along the curve — reducing unemployment but accepting higher inflation. This was the dominant approach to macroeconomic policy in the 1960s under both Conservative and Labour governments.

Example: The Barber Boom (1972-73) under Chancellor Anthony Barber involved aggressive fiscal and monetary expansion to reduce unemployment. GDP grew rapidly, but inflation accelerated sharply — reaching approximately 27% by mid-1975.

Exam Tip: Always present the Phillips curve trade-off in two stages — the original short-run trade-off (Phillips, 1958) and the long-run vertical Phillips curve (Friedman, 1968 / Phelps, 1967). Examiners will reward you for showing how thinking evolved.

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The Expectations-Augmented Phillips Curve (Friedman-Phelps)

Milton Friedman (1968) and Edmund Phelps (1967) independently challenged the idea of a stable long-run trade-off. They argued that the Phillips curve trade-off exists only in the short run and arises because of money illusion — workers temporarily fail to distinguish between nominal and real wage increases.

The Long-Run Vertical Phillips Curve

Friedman's argument:

1. The economy starts at the Natural Rate of Unemployment (NRU) — also called the Non-Accelerating Inflation Rate of Unemployment (NAIRU). This is the level of unemployment consistent with stable inflation.
2. The government expands aggregate demand to reduce unemployment below the NRU. Initially, this works — firms offer higher nominal wages, workers (suffering from money illusion) think their real wages have risen and supply more labour. Unemployment falls, but inflation rises.
3. Eventually, workers realise that prices have risen alongside wages — their real wages have not increased. They adjust their inflation expectations upward and demand higher nominal wages to compensate. Firms raise prices further.
4. The economy returns to the NRU, but at a higher rate of inflation. The short-run Phillips curve has shifted upward.
5. Any further attempt to reduce unemployment below the NRU repeats the process, leading to accelerating inflation with no permanent reduction in unemployment.

Conclusion: In the long run, the Phillips curve is vertical at the NRU. There is no long-run trade-off between inflation and unemployment. The only way to permanently reduce unemployment is through supply-side policies that lower the NRU itself.

Concept	Short-Run Phillips Curve	Long-Run Phillips Curve
Shape	Downward sloping	Vertical
Trade-off	Exists (temporarily)	Does not exist
Unemployment below NRU	Possible temporarily	Not sustainable
Policy implication	Demand management can reduce unemployment in the short run	Only supply-side policies can permanently reduce unemployment
Associated economists	Phillips (1958), Samuelson & Solow (1960)	Friedman (1968), Phelps (1967)

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Stagflation: The 1970s Challenge

The 1970s provided a dramatic test of the Phillips curve framework. The UK (and other Western economies) experienced stagflation — simultaneously high unemployment and high inflation — which appeared to contradict the original Phillips curve.

Key events:

• OPEC oil price shock (1973): Oil prices quadrupled, causing a massive cost-push inflation shock.
• UK inflation peaked at approximately 27% in August 1975, while unemployment rose above 1 million.
• The combination of rising prices and rising unemployment was inconsistent with a stable downward-sloping Phillips curve.

Friedman's explanation: Stagflation occurred because governments had tried to keep unemployment below the NRU through persistent demand expansion. This had pushed up inflation expectations, shifting the short-run Phillips curve upward. When the oil shock hit, it pushed inflation even higher while the economy was already structurally unable to sustain such low unemployment.

Exam Tip: Stagflation is a critical evaluation point. It undermined the Keynesian consensus and supported Friedman's argument that the long-run Phillips curve is vertical. However, New Keynesian economists argue that stagflation was caused by a specific supply shock (oil), not by the inherent instability of the Phillips curve trade-off.

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Growth vs Inflation

Rapid economic growth tends to be associated with rising inflation, because as aggregate demand increases, the economy approaches full capacity and firms face rising costs (labour, raw materials). The faster growth occurs, the more likely it is to generate inflationary pressure.

Policy dilemma: The government may want both growth and low inflation, but pursuing growth aggressively (through fiscal or monetary expansion) risks exceeding the economy's productive capacity and triggering demand-pull inflation.

Resolution: Supply-side policies can increase productive capacity, allowing the economy to grow without generating inflation. This is the key insight of the LRAS framework — if LRAS shifts right alongside AD, growth occurs without inflation.

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Growth vs Current Account Balance

Strong domestic growth tends to worsen the current account balance. As incomes rise, consumers import more goods and services (the marginal propensity to import is positive). If the UK grows faster than its trading partners, imports tend to rise faster than exports.