Business Economics · Recent macroeconomic history

Post-Crisis Policy: QE, Austerity and the Eurozone Crisis Explained

Updated 11 October 2026 · Fact-checked

Quantitative easing (QE) is when a central bank creates reserves to buy bonds, lowering long-term yields and easing credit once policy rates are near zero. After 2008, governments also used stimulus, then austerity. The eurozone crisis arose when weak-growth, high-debt members lost market confidence and could not devalue or print their own currency.

Understand Post-Crisis Policy: QE, Austerity and Eurozone Crisis

After the 2007-08 crisis, demand collapsed. Governments and central banks responded in stages. First came fiscal stimulus: higher spending and tax cuts to lift aggregate demand. At the same time central banks cut policy rates sharply, close to zero in the US, UK and eurozone.

When rates cannot fall further, a central bank can use quantitative easing (QE). It creates central bank reserves and buys assets, mainly government bonds. Buying raises bond prices and lowers yields. Lower long-term yields cut borrowing costs, push investors into riskier assets (the portfolio rebalancing effect), raise asset prices and wealth, and can weaken the currency. The central bank also signals that rates will stay low (forward guidance). QE is not the same as printing cash handed to households. The money mostly stays as reserves in the banking system. How far it lifts lending and inflation is debated.

Budget deficits and public debt rose sharply because of the recession, bank rescues and stimulus. From about 2010 many governments moved to austerity: spending cuts and tax rises to reduce deficits. Supporters argue it restores confidence and keeps borrowing costs down. Critics argue that cutting spending in a weak economy lowers output and tax revenue, so the debt ratio may not fall. This is linked to the size of the fiscal multiplier, which is thought to be larger when the economy has spare capacity and interest rates are at their floor.

The eurozone sovereign debt crisis hit countries such as Greece, Ireland, Portugal, Spain and Cyprus. Causes differed: high public debt in Greece, a bank-driven property bubble in Ireland and Spain, and lost competitiveness in several countries. Common factors were a single currency with one interest rate, no ability to devalue, no common fiscal union, and the link between weak banks and weak governments (the doom loop). Bond yields rose, and rescues came with conditions. The ECB's promise to do whatever it takes and later bond purchases calmed markets.

For the exam, you must describe each policy, explain how it works through the economy, and evaluate its strengths and limits.

Key rules to remember

Simple spending multiplier: k = 1 ÷ (1 − MPC × (1 − t) + MPM), which simplifies to k = 1 ÷ (1 − MPC) when there are no taxes or imports; Here MPC is the marginal propensity to consume out of disposable income, t is the tax rate on income, and MPM is the marginal propensity to import (the share of each extra rupee of income spent on imports). Use the simplified form only if the question ignores taxes and imports (t = 0 and MPM = 0). With taxes and imports, the multiplier is smaller. Austerity debates turn on its size.
Change in output from a spending change: ΔY = k × ΔG; A cut in government spending (ΔG negative) lowers output by a multiple. Taxes work through MPC × ΔT, with a smaller effect than spending.
Bond price and yield: Price = Σ C ÷ (1 + y)^t + F ÷ (1 + y)^n; Price and yield move in opposite directions. QE buying raises prices and lowers yields.
Debt-to-GDP ratio: Debt ratio = Public debt ÷ GDP; It can rise even when debt is cut, if GDP falls by more in proportion.

How to solve Post-Crisis Policy: QE, Austerity and Eurozone Crisis questions

Use this method for any question on post-crisis policy, whether short answer, essay or MCQ.

1Identify the policy named: stimulus, rate cuts, QE, austerity or a eurozone feature.
2State the problem it was meant to solve, such as weak demand, frozen credit or high deficits.
3Give the transmission chain in order, for example QE → bond purchases → lower yields → cheaper credit and higher asset prices → higher spending.
4Add numbers or direction of change if asked, such as a multiplier or a bond price effect.
5Evaluate: give limits such as the zero lower bound, weak bank lending, inequality from asset prices or output falls under austerity.
6Link to context: country, time period, size of spare capacity and whether rates were at the floor.
7Finish with a short judgement that depends on conditions, not an absolute claim.

Quickest way: Chain, limit, condition

When to use it: Use when you have little time on a written question or need to eliminate MCQ options.

Write the chain in one line using arrows.
Write one limit in one line.
Write one condition that changes the result, such as spare capacity or monetary room.
For eurozone questions, list three causes: debt or deficits, banking links, no exchange rate or independent monetary policy.
For MCQs, reject options that say QE is cash given to the public, or that austerity always lowers debt ratios.

Common mistakes in Post-Crisis Policy: QE, Austerity and Eurozone Crisis

Saying QE means the central bank prints notes and gives them to people.
The phrase money printing is used loosely in the media.
Fix: Say the central bank creates reserves electronically and buys assets, mainly bonds, from the market.
Treating QE and cutting the policy rate as the same tool.
Both loosen policy.
Fix: Policy rate cuts target short rates. QE targets long-term yields and is used when short rates are near zero.
Claiming austerity always reduces the debt-to-GDP ratio.
Students think lower deficits must mean lower debt ratio.
Fix: Show that if GDP falls by more than debt in proportion, the ratio rises. It depends on the multiplier.
Blaming the eurozone crisis on Greece alone.
Greece got the most attention.
Fix: Name different causes: Irish and Spanish banking and property booms, loss of competitiveness, and the structural design of the euro.
Describing effects without any evaluation.
Students stop after the transmission chain.
Fix: Add limits and conditions, then a conclusion.
Getting bond price and yield the wrong way round.
Both seem to rise together with demand.
Fix: When bond demand rises, price rises and yield falls.

Worked examples

Example 1

Explain how quantitative easing was meant to support an economy after 2008, and give two limitations. (Short written answer)

Show the solution

Context: policy rates were near zero, so further rate cuts were not possible.
The central bank created reserves and bought government bonds, and sometimes other assets.
Demand for bonds rose, so prices rose and yields fell.
Lower long-term yields reduce borrowing costs for firms and households.
Investors moved into riskier assets, raising share and property prices, which increases wealth and spending.
Limitation 1: banks may not lend more if demand for credit is weak or capital is short, so reserves stay idle.
Limitation 2: higher asset prices benefit asset owners most, which can increase inequality, and QE may be hard to unwind.

Answer: QE lowers long-term yields and raises asset prices to stimulate spending when policy rates are at the floor. Its effect is limited by weak lending and it can widen inequality.

Example 2

A government with no tax or imports has MPC = 0.8. It cuts spending by ₹50,000 crore. Find the change in output with the simple multiplier, and say why the real effect could be different.

Show the solution

k = 1 ÷ (1 − MPC) = 1 ÷ (1 − 0.8) = 1 ÷ 0.2 = 5.
ΔY = k × ΔG = 5 × (−₹50,000 crore) = −₹2,50,000 crore.
In practice taxes and imports leak spending, so the real multiplier is smaller than 5. Taken alone, this makes the real fall in output smaller than ₹2,50,000 crore.
Working the other way, if the economy has spare capacity and rates are at the floor, the multiplier is thought to be larger than its normal-times value. Taken alone, this makes the real fall in output larger.
The net effect depends on which force dominates, so ₹2,50,000 crore is the simple-model result only, not a forecast of the real outcome.
A fall in output also lowers tax revenue, so the deficit may fall by less than planned.

Answer: Under the simple model, output falls by ₹2,50,000 crore. In practice leakages from taxes and imports make the fall smaller, while spare capacity and rates at the floor can make it larger. The net direction depends on which dominates.

Exam tips

Always give the transmission chain in order. Examiners award marks for each link.
Evaluation is where marks are gained. Use words like depends on, provided that, and in the short run.
For the eurozone, structure by cause: fiscal, banking, competitiveness and currency design.
Do not state exact figures for debt or yields unless you are sure. Direction and mechanism are safer.
In MCQs, watch for absolute words such as always and only.

Practice questions from Recent macroeconomic history

Post-Crisis Policy: QE, Austerity and Eurozone Crisis: frequently asked questions

What is quantitative easing and how does it work?

QE is when a central bank creates reserves and buys bonds to lower long-term interest rates when policy rates are near zero. Lower yields make borrowing cheaper and raise asset prices. This is meant to lift spending and inflation.

Was austerity or stimulus the better response after 2008?

There is no single answer. Stimulus helps most when there is spare capacity and monetary policy is at its limit. Austerity may restore confidence where borrowing costs are rising, but it can slow growth. Always state the conditions in your answer.

What caused the eurozone sovereign debt crisis?

Causes included high public debt in some members, bank and property booms in others, loss of competitiveness, and a currency union without a common fiscal system. Members could not devalue. Weak banks and weak governments also reinforced each other.

How is this topic tested in CB2?

Expect multiple-choice questions on definitions and mechanisms, and written questions asking you to explain and evaluate policies. Practise short chains and evaluation points.