Economics Multiplier Effect Explained
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Questions and Answers

What are the three factors that influence the MPS, MPT, and MPM?

The MPS, MPT, and MPM are influenced by income, wealth, and expectations.

How does Singapore's lower MPS and MPM compared to the USA affect its economy?

Singapore's lower MPS and MPM compared to the USA are due to a combination of factors, including a smaller population, a compulsory CPF savings scheme, and a lack of domestic resources, leading to a larger proportion of additional income being used for imports.

Explain the first step in the multiplier process using the AD/AS model.

The first step in the multiplier process using the AD/AS model involves a rise in autonomous export earnings, causing an initial increase in income within the economic system.

What is the knock-on effect of the multiplier process in terms of consumer spending?

<p>The knock-on effect of the multiplier process is that the initial rise in income leads to higher consumer spending, further increasing income through a series of rounds.</p> Signup and view all the answers

Give a numerical example of how the multiplier effect works.

<p>For a $10 million increase in autonomous exports, assuming an MPC of 0.8, households will initially spend $8 million, leading to an increase in National Income of $8 million. This process continues, with each round spending a portion of their existing income.</p> Signup and view all the answers

Explain what happens in the AD/AS model when there is a rise in export expenditure.

<p>A rise in export expenditure shifts the AD curve to the right. The extent of the shift depends on the size of the multiplier, which is directly related to the MPC and inverse relationship to the MPW.</p> Signup and view all the answers

What factors influence the size of the multiplier?

<p>The size of the multiplier is directly related to the MPC and inverse relationship with the MPW.</p> Signup and view all the answers

How does government spending affect the multiplier?

<p>Government spending also affects the multiplier, with an example showing that a government wanting to increase National Income by $100 million with an MPC of 0.6 would need to increase government spending by $40 million.</p> Signup and view all the answers

What factors affect the impact of a rise in National Income?

<p>The impact of a rise in national income is influenced by whether the increase is real or nominal. A real increase represents growth in the economy, while a nominal increase may be due to inflation.</p> Signup and view all the answers

Flashcards

Multiplier Process

The economic process where an initial change in spending leads to increased national income through successive rounds of spending.

Autonomous Spending

Expenditures that occur without regard to current income levels, like government spending or exports.

Multiplier Effect

The phenomenon where an increase in autonomous spending causes a larger final increase in national income.

Marginal Propensity to Consume (MPC)

The fraction of additional income that households spend on consumption.

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Marginal Propensity to Withdraw (MPW)

The fraction of additional income that is not spent, but saved, taxed, or used for imports.

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Calculation of Multiplier

The multiplier (k) can be calculated as k = 1 / (1 - MPC) or k = 1 / MPW.

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Example of Multiplier

If MPC is 0.8, a $10 million increase leads to a $50 million total effect.

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Real vs. Nominal National Income

Real NY accounts for inflation while nominal NY does not.

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Aggregate Demand (AD)

The total demand for goods and services within an economy at a given overall price level and in a given time period.

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AD/AS Model

A model showing the relationship between aggregate demand (AD) and aggregate supply (AS).

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AE-Y Diagram

A graphical representation of aggregate expenditures (AE) against national income (Y).

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Shift of AD Curve

An increase in exports shifts the AD curve to the right, indicating a rise in aggregate demand.

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Knock-On Effect

The ripple effect of increased spending leading to further income generation.

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Income Recipients

Individuals or entities that receive income through the multiplier process.

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Leakages

Portions of income that are not spent in the economy, such as savings, imports, and taxes.

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Full Resource Utilization

A state where all resources in an economy are being used efficiently.

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Equilibrium National Income

The level of income where aggregate demand equals aggregate supply.

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Consumption Multiplier

The total effect on national income resulting from an increase in consumption via the multiplier process.

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National Income (NY)

The total income earned by a nation's residents and businesses, including wages, profits, rents, and taxes.

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Initial Injection

The initial amount of spending that starts the multiplier process.

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Successive Rounds of Spending

The ongoing cycle of spending and re-spending throughout the economy initiated by the initial injection.

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Proportional Spending

Relating the amount of spending to the level of income increase.

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Exogenous Factor

An external factor that can affect aggregate demand, such as changes in foreign incomes influencing exports.

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Shifts in AD

Changes in aggregate demand caused by factors like consumer confidence, government policy, or changes in foreign trade.

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Economic Equilibrium

A situation where economic forces such as supply and demand are balanced.

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Cyclic Nature of Economy

The idea that economies go through cycles of growth and contraction influenced by various factors, including the multiplier.

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AD Increase

A rise in aggregate demand due to factors such as increased spending on exports.

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Multiplier Performance

The evaluation of how effectively a change in spending creates further economic activity.

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Macro-Economic Stability

The condition in which an economy is stable with low inflation and low unemployment.

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Study Notes

Multiplier Effect Explained

  • MPS, MPT, and MPM only increase when receiving additional income. Households withdraw a significant portion of their added income.
  • Singapore has a lower proportion of savings (S and M) compared to the USA. This is due to Singapore's smaller population.
  • Singapore's workers have higher MPS and MPM because of mandatory CPF savings.
  • Domestic resources are limited, thus importing a large portion of additional income.

Multiplier Process (AD/AS Model)

  • Step 1: Identify the change in autonomous spending.
  • Step 2: State the multiplier effect.
  • Step 3: Give a numerical example (e.g., export earnings rise). An increase in exports (e.g., $10 million) causes a rise in income. The first group of recipients (exporting firms) receive additional income of $10m.
  • Step 4: Draw and explain the AE-Y diagram. The diagram demonstrates the shifts in Aggregate Demand (AD) as a result of the spending and re-spending.
  • Step 5: State the size of the multiplier. The multiplier (k) is calculated as 1/(1-mpc) = 1/mpw. An example of multiplier calculation is provided.
  • Step 6: Analyze whether the effect on NY is real or nominal. The impact on national output (NY) depends on whether the economy is operating below/at full resource utilization.

AD Shifts

  • A rise in exports expenditure causes a shift in AD. The AD curve shifts to AD1 then AD2, leading to an increase in equilibrium Y from Y to Y2.

Multiplier Calculation

  • The size of the rise in NY (national income / output) depends on the multiplier (k), which is directly related to the marginal propensity to consume (mpc) and inversely related to the marginal propensity to withdraw (mpw).
  • The multiplier (k) is calculated as 1 / (1-mpc) or 1/mpw. A numerical example demonstrates this.

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Description

This quiz explores the concept of the multiplier effect in economics, detailing the relationships between marginal propensities to save and consume. It examines the differences between Singapore and the USA in terms of savings and income, and how this impacts aggregate demand. Students will also learn to apply the AD/AS model through practical examples.

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