Macroeconomics guide, Unit 7, step 22 of 23Previous step Next step

Step 22: Macroeconomic Objectives and Policy Conflicts

By the EconTutorials team. 11-minute read with 6 practice questions.

SyllabusCambridge 5.1, 10.1–10.3 · IB 3.3

In 30 seconds

Governments aim for six big things: steady growth, low unemployment, low and stable inflation, a sustainable balance of payments, a fair income distribution and environmental sustainability.
These aims often clash. The classic clash is the short-run Phillips trade-off: $ \pi = \pi^e – \beta(u – u_n) $, so pushing unemployment below its natural rate raises inflation.
Fast growth can also worsen the current account and damage the environment.
No single policy fixes everything. Exam marks come from judging policies against time lags, poor information, expectations and global shocks, then reaching a supported conclusion.

Video lesson coming soonA short animated lesson for this step will appear here.

What governments are trying to achieve

Think about how you would judge whether a family is doing well: rising income, jobs for everyone who wants one, no sudden price jumps, no borrowing it cannot repay, money shared fairly and a home not wrecked for the next generation. A government judges a whole economy in almost the same way.

The six main macroeconomic objectives are:

Sustained economic growth: a steady rise in real GDP, close to the long-run trend rate, without boom and bust.
Low unemployment: close to the natural rate, with little cyclical (demand-deficient) unemployment.
Low and stable inflation: many central banks target about 2% a year. Surprises cause the damage, so stable matters as much as low.
Balance of payments stability: no large, persistent current account deficit financed by ever-growing borrowing.
Equity: a fair (not necessarily equal) distribution of income and wealth, limiting extreme inequality and poverty.
Sustainability: growth that meets today’s needs without harming future generations’ ability to meet theirs.

Key termMacroeconomic objectives: the main goals a government sets for the whole economy, such as growth, low unemployment, stable prices, a sustainable balance of payments, equity and sustainability.

The trouble is that a government has limited tools. Pulling one lever to help one objective often hurts another.

Key termPolicy conflict: a situation where a policy that moves the economy closer to one objective moves it further away from another.

Conflict 1: inflation versus unemployment

Imagine a busy café in a booming town. The owner needs more staff, but most good workers already have jobs, so she must offer higher wages, and she raises the price of coffee to cover them. Multiply that across the economy and you get the Phillips curve: when demand pushes unemployment down, inflation tends to rise.

The modern version, which the books use, is the expectations-augmented Phillips curve:

\[ \pi = \pi^e – \beta(u – u_n) \]

Here $ \pi $ is actual inflation, $ \pi^e $ is expected inflation, $ u $ is the unemployment rate, $ u_n $ is the natural rate of unemployment, and $ \beta $ (beta) measures how strongly inflation responds when unemployment moves away from its natural rate.

Worked example

For example, suppose expected inflation is 2%, the natural rate of unemployment is 5% and $ \beta = 0.5 $. The government boosts demand so unemployment falls to 3%. What happens to inflation in the short run?

Step 1$ u – u_n = 3 – 5 = -2 $

Step 2$ -\beta(u – u_n) = -0.5 \times (-2) = +1 $

Step 3$ \pi = 2 + 1 = 3\% $

Inflation rises from 2% to 3%: 2 percentage points less unemployment at the cost of 1 point more inflation. Once workers expect 3% inflation, $ \pi^e $ rises and the trade-off worsens.

DiagramPut inflation (%) on the vertical axis and unemployment (%) on the horizontal axis. Draw a downward-sloping short-run Phillips curve (SRPC) and a vertical long-run Phillips curve (LRPC) at 5%. Start at A (5%, 2% inflation). Higher demand moves the economy along the SRPC to B (3% unemployment, 3% inflation). As expected inflation rises, the SRPC shifts up and unemployment drifts back to 5% at C, with inflation higher than at A.

The trade-off exists only in the short run. In the long run, unemployment returns to $ u_n $, so holding it below the natural rate just produces ever-rising inflation. A supply shock, such as a sharp rise in oil prices, is worse still: it raises inflation and unemployment together (stagflation), leaving demand-side policy with no good option.

Conflict 2: growth versus the current account

When incomes rise, people buy more imported phones, cars and holidays. If exports do not keep up, the current account worsens. Booms can also raise inflation, making exports less price-competitive.

Worked example

For example, an economy has real GDP of $1,000 billion and a current account deficit of $5 billion. Real GDP grows by $40 billion. The marginal propensity to import (MPM) is 0.25, and exports stay the same. What happens to the current account?

Step 1$ \Delta M = \text{MPM} \times \Delta Y = 0.25 \times 40 = \$10 \text{ billion} $

Step 2$ \text{New deficit} = 5 + 10 = \$15 \text{ billion} $

Step 3$ \dfrac{15}{1{,}040} \times 100 \approx 1.4\% \text{ of GDP} $

Growth of 4% has tripled the deficit, from $5 billion to $15 billion. Whether this matters depends on how it is financed and whether it lasts.

Conflict 3: growth versus the environment (and equity)

More output usually means more energy use, carbon emissions, deforestation and depleted resources. These are negative externalities: costs that fall on third parties and future generations. So growth can clash with sustainability.

Growth can also clash with equity. Gains may go mainly to owners of capital and highly skilled workers, while higher taxes to reduce inequality may weaken incentives to work and invest.

These conflicts are not fixed. Cleaner technology, carbon taxes and renewable energy let an economy grow while cutting emissions. Good evaluation says when a conflict is strong and what could reduce it.

Common mistakeSaying “growth always causes inflation” or “growth always worsens the current account”. These are tendencies, not laws. Growth driven by higher productivity (an outward shift of LRAS) can bring growth with falling inflation and more competitive exports. Always say which type of growth you mean: demand-led or supply-led.

The policy toolkit and how well it works

Governments have three main families of policy. Using several together is called the policy mix.

Policy	Tools	Main strength	Main weakness
Fiscal	Government spending, taxation	Can target groups or regions; strong in a deep recession	Long decision lag; raises debt; may crowd out investment
Monetary	Interest rates, money supply, quantitative easing	Quick to decide; run by an independent central bank	Takes a long time to affect the economy; weak when rates are near zero
Supply-side	Education and training, deregulation, tax incentives, infrastructure	Shifts LRAS right: more growth with lower inflation, so it eases conflicts	Very slow; can be costly; some measures may increase inequality

Key termPolicy mix: the combination of fiscal, monetary and supply-side policies a government and central bank use together to pursue several objectives at once.

When you judge how effective any policy is, four problems come up again and again:

Time lags. It takes time to spot a problem, agree a response and for spending to change. Interest rate changes can take a year or more to work fully; by then the economy may have recovered, so the policy fuels a boom.
Information problems. Data arrive late and are revised, and nobody can measure the natural rate or the output gap exactly. Policymakers steer while looking in the rear-view mirror.
Expectations. A tax cut people expect to be temporary may be saved, not spent. If people doubt the central bank, wage demands stay high and fighting inflation costs more jobs. Credibility makes policy cheaper.
Global shocks. A small open economy cannot control world oil prices, a trading partner’s recession or a global financial crisis.

Policies can also work against each other: an expansionary budget combined with rising interest rates partly cancels out.

Exam tipCambridge 9708 Paper 4 and IB Paper 1 essays reward evaluation. Top-band answers define the objectives, explain the conflict with a labelled AD/AS or Phillips curve diagram, weigh at least two policies using specific limits (time lags, a supply shock), and end with a judgement saying what the answer depends on most. AP Macroeconomics FRQs test the same Phillips curve: label axes, show the SRPC shift, and state that the LRPC is vertical at the natural rate.

How to structure an evaluation essay

Use this plan for questions like “Evaluate whether a government can achieve all its macroeconomic objectives at the same time.”

Introduction. Define the objectives and key terms in the question.
Analysis: why conflicts arise. Explain one or two conflicts as a chain of reasoning, with a diagram you refer to (“the move from A to B”).
Analysis: how they might be reduced. Supply-side policy that shifts LRAS right, or a policy mix with one tool per objective.
Evaluation. Is the economy near full capacity? Is the shock from demand or supply? How long are the lags? Are expectations anchored?
Conclusion. Give a clear answer, for example: “conflicts are likely in the short run, especially after a supply shock, but successful supply-side policy can make objectives compatible in the long run.” Say what it depends on most.

Practise: 6 questions

Try each one on paper first, then check the worked answer.

EasyQ1. List six macroeconomic objectives and explain why “stable” inflation matters as well as “low” inflation. Show worked answer

Objectives: sustained economic growth; low unemployment; low and stable inflation; balance of payments stability; equity (a fair distribution of income); sustainability.
Unexpected inflation causes the damage: it redistributes income from lenders to borrowers, makes investment hard to plan and confuses price signals. A steady rate can be built into wage and loan contracts.

EasyQ2. Expected inflation is 3%, the natural rate of unemployment is 6% and $ \beta = 0.5 $. Unemployment falls to 4%. Use $ \pi = \pi^e – \beta(u – u_n) $ to find inflation. Show worked answer

$ u – u_n = 4 – 6 = -2 $
$ -\beta(u – u_n) = -0.5 \times (-2) = +1 $
$ \pi = 3 + 1 = 4\% $
Inflation rises from 3% to 4% in the short run.

MediumQ3. An economy has a current account deficit of $8 billion. Real GDP rises by $50 billion, the marginal propensity to import is 0.2 and exports do not change. Calculate the new current account balance and explain one reason why the government might not worry. Show worked answer

Rise in imports $ = 0.2 \times 50 = \$10 $ billion.
New balance $ = -8 – 10 = -\$18 $ billion (a deficit of $18 billion).
It might not worry if the extra imports are capital goods that will raise future exports, or if the deficit is small relative to GDP and financed by long-term inflows such as FDI.

MediumQ4. Explain how time lags can make a cut in interest rates harmful rather than helpful. Show worked answer

Data showing a slowdown arrive late, and a rate cut may take a year or more to raise consumption and investment. If the economy recovers on its own meanwhile, the extra demand arrives in the upswing, pushing real GDP above potential (a positive output gap) and raising inflation. The policy makes the cycle bigger, not smaller.

MediumQ5. World oil prices double. Explain why this creates a policy dilemma for the central bank. Show worked answer

Higher oil costs shift SRAS left: the price level rises and real GDP falls, so inflation and unemployment both rise (stagflation). Raising interest rates to fight inflation cuts AD and raises unemployment further; cutting rates to protect jobs raises inflation further. Demand-side policy cannot fix both, so the bank must choose which objective comes first.

ExamQ6. Evaluate whether supply-side policies are the best way for a government to achieve its macroeconomic objectives without conflict. [12 marks] Show worked answer

Knowledge and understanding (up to 3): define supply-side policy (measures that raise productive capacity, shifting LRAS right) with examples: education and training, infrastructure, deregulation, lower marginal tax rates.
Analysis (up to 4): AD/AS diagram with LRAS shifting right: real GDP rises and the price level falls or rises more slowly, so growth and low inflation are achieved together; more competitive exports improve the current account; more skilled workers lower structural unemployment. This avoids the Phillips trade-off that demand-side policy faces.
Evaluation (up to 5): long time lags, as education takes years, so no help in a sudden recession; costly, which may conflict with cutting the budget deficit; some measures (tax cuts for high earners, weaker labour protection) may worsen equity; growth may still harm the environment; cannot offset global shocks or cyclical unemployment. Conclusion: supply-side policy is the best long-run way to reduce conflicts, but must be combined with demand management in the short run; success depends on which measures are chosen.

Check yourself

1. In the long run, the Phillips curve is:

In the long run expected inflation catches up with actual inflation, so unemployment returns to $ u_n $ whatever the inflation rate.

2. Which event is most likely to raise inflation and unemployment at the same time?

An oil price rise is a negative supply shock that shifts SRAS left, causing stagflation.

3. Why might rapid growth worsen the current account?

Imports depend on income: with a positive marginal propensity to import, higher income pulls in more imports.

Your score: 0 out of 3

The short version

The six objectives are growth, low unemployment, low and stable inflation, balance of payments stability, equity and sustainability.
In the short run, $ \pi = \pi^e – \beta(u – u_n) $ gives a trade-off between inflation and unemployment; in the long run there is none.
Demand-led growth tends to raise imports and pollution, so it can clash with the current account and sustainability.
Fiscal, monetary and supply-side policies are limited by time lags, poor information, expectations and global shocks, so a policy mix is usually needed.
In essays: define, explain the conflict with a diagram, weigh policies, then give a clear “it depends most on…” conclusion.