Posts Tagged ‘Keynesian Policy’

A2 Economics: Two ways of calculating the equilibrium level of income

November 10, 2017 Leave a comment

Went through an A2 multiple-choice question on calculating the equilibrium level of income with my A2 class. There are two ways that it can be worked out. Here is the question:

In a closed economy with no government C = 30 + 0.8 Y and I = 50, where C is consumption, Y is income and I is investment.

What is the equilibrium level of income?

A 64                B 80              C 250               D 400

Below is the most common way of working the question out:

Y = C + I

Y = 30 + 0.8Y + 50

0.2Y = 80

Y = 400

Here is the other way that you should be able to work out the equilibrium

Remember: Savings = Income – Consumption

S = Y – C

S = Y – (a + cY)

S = Y – a – cY

S = -a + (1-c) Y

So if we put the figures into the equation you get:

50 = -30 + (1-0.8) Y

50 = -30 + 0.2Y

80 = 0.2Y

Y = 400


A2 Revision – New Classical to Extreme Keynesian

October 27, 2017 Leave a comment

The main competing views of macroeconomics (Keynesian vs Monetarist) is part of Unit 5 in the A2 syllabus and is a popular topic in the essay and multiple-choice papers. Begg covers this area very well in his textbook. In looking at different schools of thought it is important to remember the following:

Aggregate Demand – the demand for domestic output. The sum of consumer spending, investment spending, government purchases, and net exports
Demand Management – Using monetary and fiscal policy to try to stabilise aggregate demand near potential output.
Potential Output – The output firms wish to supply at full employment after all markets clear
Full Employment – The level of employment when all markets, particularly the labour market, are in equilibrium. All unemployment is then voluntary.
Supply-side policies – Policies to raise potential output. These include investment and work incentives, union reform and retraining grants to raise effective labour supply at any real wage; and some deregulation to stimulate effort and enterprise. Lower inflation is also a kind of supply-side policy if high inflation has real economic costs.
Hysteresis – The view that temporary shocks have permanent effects on long-run equilibrium.

There are 4 most prominent schools of macroeconomics thought today.

New Classical – assumes market clearing is almost instant and there is a close to continuous level of full employment. Also they believe in rational expectations which implies predetermined variables reflect the best guess at the time about their required equilibrium value. With the economy constantly near potential output demand management is pointless. Policy should pursue price stability and supply-side policies to raise potential output.

Gradualist Monetarists – believe that restoring potential output will not happen over night but only after a few years. A big rise in interest rates could induce a deep albeit temporary recession and should be avoided. Demand management is not appropriate if the economy is already recovering by the time a recession is diagnosed. The government should not fine-tune aggregate demand but concentrate on long-run policies to keep inflation down and promote supply-side policies to raise potential output.

Moderate Keynesians – believe full employment can take many years but will happen eventually. Although demand management cannot raise output without limit, active stabilisation policy is worth undertaking to prevent booms and slumps that could last several years and therefore are diagnosed relatively easily. In the long run, supply-side policies are still important, but eliminating big slumps is important if hysteresis has permanent effects on long-run equilibrium. New Keynesians provide microeconomics foundations for Keynesian macroeconomics. Menu costs may explain nominal rigidities in the labour market.

Extreme Keynesians – believe that departures from full employment can be long-lasting. Keynesian unemployment does not make real wage fall, and may not even reduce nominal wages and prices. The first responsibility of government is not supply-side policies to raise potential output that is not attained anyway, but restoration of the economy to potential output by expansionary fiscal and monetary policy, especially the former.

A2 Economics – Keynesians vs Monetarists

March 29, 2017 Leave a comment

Just been going through this part of the course with my A2 class and came across a table from some old A Level notes produced by Russell Tillson (ex Epsom College Economics and Politics Department) to help them understand the principal differences.

Keynes v Hayek with Chinese characteristics.

December 3, 2016 Leave a comment

You will no doubt have heard about the battle of ideas – Keynes v Hayek. In the 1930’s this was probably the most famous debate in the history of economics – the battle of ideas -government v markets.

Now there is Chinese version of the debate:

Justin Lin (Keynes) versus Zhang Weiying (Hayek) – both are Professors at Peking University. Lin is on the right of the image below.

lin-v-zhangTheir latest debate is about industrial policy and the concept that the government can set the example of how to run successful industries – in the 1980’s textiles and today renewable energy. Although China’s growth record would seem to justify this some have seen these state run industries produce little innovation. Lin believes that countries that have a comparative advantage should receive help from the government whether it be in the form of tax cuts or improved infrastructure. Furthermore, because resources are limited the government should help in identifying industries which have earning  potential. This assistance includes subsidies, tax breaks and financial incentives — aimed at supporting specific industries considered crucial for the nation’s economic growth.

Zhang sees this industrial policy as a failure in that he believes government officials don’t know enough about new technologies.  He uses the example in the 1990s, when the Chinese government spent significant money on the television industry only for the cathode ray tubes to become outdated. He is also concerned about industrial inertia with local officials following the central government’s direction which tends to lead to an overcapacity. Zhang, however, credited the free market — not politically motivated government subsidies — with game-changing innovations that benefit society eg. James Watt and the steam engine, George Stephenson’s intercity railway, and Jack Ma’s innovative online marketplaces under Alibaba.

China’s ongoing transition to a market-based economy has relied on labour, capital and resource-intensive industries. But the transition’s negative side effects have included structural imbalances and excess capacity in certain sectors. Moreover, some state-owned enterprises such as telecoms have been challenged by disruptive innovators, such as social networks.

Zhang said industrial policy can foster greed. For example, companies may collude with government officials to win special favours. And policymakers can make mistakes, given that even the most well-informed intellectual cannot always predict market trends. Other economists have contributed to the debate stating that a lot of the most successful companies have not had any government assistance in their early years.

However the debate is sure to continue – what works best ‘Markets or Governments’?


The Economist – 5th November 2016


A2 Revision: Keynes 45˚ line

September 14, 2016 Leave a comment

With the Cambridge A2 exam coming up here is a revision note on Keynes 45˚ line. A popular multi-choice question and usually in one part of an essay. Make sure that you are aware of the following;

Common Errors:
1. C and S are NOT parallel
2. The income level at which Y=C is NOT the equilibrium level of Y which occurs where AMD crosses the 45˚ line.
To Remember:
1. OA is autonomous consumption.
2. Any consumption up to C=Y must be financed.
3. At OX1 all income is spent
4. At OB consumption = BQ and saving= PQ
5. Equilibrium level of Y shown in 2 ways
a) where AMD crosses 45˚ line
b) Planned S = Planned I – point D

Remember the following equilibriums:
2 sector – S=I
With Govt – S+T = I+G
With Govt and Trade – S+T+M = I+G+X

Keynes v Monetarist – Powerpoint download

March 31, 2016 Leave a comment

Here is a powerpoint on “Keynesian and Monetarist Theory” that I use for revision purposes. I have found that the graphs are particularly useful in explaining the theory. The powerpoint includes explanations of:

– C+I+G+(X-M)
– 45˚line
– Circular Flow and the Multiplier
– Diagrammatic Representation of Multiplier and Accelerator
– Quantity Theory of Money
– Demand for Money – Liquidity Preference
– Defaltionary and Inflationary Gap
– Extreme Monetarist and Extreme Keynesian
– Summary Table of “Keynesian and Monetarist”
– Essay Questions with suggested answers.

Hope it is of use – 45˚line shown. Click the link below to download the file.
Keynes v Monetarist Keynote

A2 Revision – Keynesian and Post-Keynesian Period

May 6, 2015 Leave a comment

I have discussed with my A2 class the end of the Gold Standard and the new era of self-regulating markets that started in the 1980’s under Reagan (US) and Thatcher (UK). This relates to Unit 5 in the A2 syllabusMain schools of thought on how the macroeconomy functions – Keynesian and monetarist.

Robert Skidelsky, in his book “Keynes – The Return of the Master”, outlined the Keynesian and Post-Keynesian periods. The Keynesian period was the Bretton Woods system whilst the “New Classical” Washington consensus system succeeded it. Both are outlined below:

The Bretton Woods system was designed to improve the rules and practices of the liberal world economy which had grown up sporadically in the 19th century. However in 1971 the fixed exchange rate system collapsed (see post Fixed exchange rates and the end of the Gold Standard) and the full employment objective was cast aside. Futhermore controls on capital were removed in the 1990’s. The new system introduced was more free market based and took the name of the Washingotn Consensus System.

According to Skidelsky the two regimes were shaped by two different philosophies. The Bretton Woods system broadly reflected the Keynesian view that an international economy needed strong political and institutional supports if it was to be acceptably stable. The Washington consensus was driven by free market principles of self-regulation and limited government intervention.

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