L5 - Aggregate Spending and Business Cycles Flashcards

1
Q

What are Trade/Business Cycles?

A

Periodic fluctuations in the rate of economic activity, as measured by levels of employment, prices and production.

First used in 1919

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2
Q

What are the differing periods of business cycles?

A
  • UK: 1800-1860: 14 cycles averaging 4.3 years

* 1860-1914: 7 cycles averaging 7.5 years

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3
Q

Why was there a greater regularity and length in cycles after 1860?

A

Due to the increased importance of the investment cycle relative to the trade cycle.

Also shifts in employment: From Agricultural to Industrial (Seasonal to Full-time)

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4
Q

What are the differing business phases?

A
  • Peak
  • Recession
  • Trough
  • Recovery
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5
Q

What is a Peak?

A

The top of the cycle – productive capacity fully utilised shortages may start to develop

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6
Q

What is a Recession?

A

Downturn in activity. Defined as a fall in real GDP for two successive quarters.

Typically incomes and employment levels fall. Profits may also decline as some firms experience financial difficulties. A recession that is deep and long lasting is called a depression.

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7
Q

What is a Recovery?

A

Characterised by rising incomes, employment and consumption.
Business expectations become more optimistic and new investment projects are begun.

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8
Q

What is a Trough?

A

Characterised by high unemployment and low demand in relation to the capacity to produce. Business confidence is low

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9
Q

What was the unemployment rate in the Great Depression?

A

-Reaching 2 million in 1922 and peaking at around 3 million (22%) in 1932

1931-2: 34.5% of coal miners,
36.3% of pottery workers, 43.2% of cotton operatives, 43.8% of pig-iron workers, 47.9% of steelworkers and 62% of shipbuilders and ship-repairers were unemployed

Marx was first to realise that recessions led to unemployment.

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10
Q

What was Hobson’s (1896) interpretation for the Great Depression?

A

Identified cause as ‘Over-production’

  • Poor people spend more than rich
  • Rich people save too much
  • Due to savings being too high and consumption too low (due to the unequal distribution of incomes, as the rich spent less than the poor)
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11
Q

What was the economic response to the Great Depression?

A
  • Economy as fundamentally sound.
  • Lionel Robbins at the LSE and Joseph Schumpeter at Harvard both said that nothing should be done

Schumpeter:
“this is not all: our analysis leads us to believe that recovery is sound only if it does come of itself.”

Churchill (representing treasury view):
“It is the orthodox treasury dogma, … that whatever might be the political and social advantages, very little additional employment can in fact… be created by state borrowing and expenditure.”

Keynes (1929):
“I know of no British economist of reputation who supports the proposition that schemes of National Development are incapable of curing unemployment.”

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12
Q

What was Keyne’s view into his general theory?

A
  • Effective demand key to full employment
  • Model based on short run over which excess of supply of output which would not be eliminated automatically
  • In Long Run all dead
  • SR traditionally defined as a period over which there is a negative output gap. i.e. the level of demand is less than potential productive potential of the economy (Y
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13
Q

What are the temporary assumptions behind Keyne’s theory?

A

Given SR assumptions of model. Assumptions made.

  • The industrial structure of the economy is fixed
  • Firms’ output is aggregated into a single productive sector producing output which is homogenous
  • The price level is fixed: i.e. real and nominal values are identical, or alternatively, all variables are measured in real terms (constant prices)
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14
Q

What determines the level of Aggregate Expenditure?

A
  • Divided production to Consumption Goods purchased by household goods (C) & Capital Goods purchased by firms (I)
  • C & I divided into autonomous and induced spending
  • Autonomous (Exogenous) spending is that spending independent of current income
  • Spending which rises with income is referred as Induced spending
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15
Q

What is the Consumption Function?

A

The amount of aggregate consumption mainly depends upon the amount of aggregate income: More money, the more you spend

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16
Q

Why did Keynes create the Consumption function?

A

Behavioural relationship between planned consumption (C) and income (Y) such that C is positively related to Y (or disposable income, Yd). i.e. C is a function of Yd

i.e. As Y/Yd increases Planned Consumption (C) increases as well

17
Q

What is the calculation for the MPC?

A

ΔC/ ΔY where 0< ΔC/ ΔY <1

MPC always lies between 0 and 1

18
Q

What does the MPC imply based on Keynes theory?

A
  • The change in consumption is less than the change in income
  • Keynes argues MPC smaller at higher incomes and larger at low incomes.
  • Suggests implied consumption function non-linear
19
Q

What is the calculation for the APC?

A

APC = C/Y

20
Q

What does the APC imply based on Keynes theory?

A
  • Keynes also says that “on average” C and Y will rise (or fall) together
  • C/Y ratio would fall as incomes increased
  • A greater proportion of income being saved as real income rises
  • Also implies consumption function not linear
21
Q

What is the Linear Consumption Equation denoted as?

A

C= a +bY

Where:
C= Consumption

a= Autonomous Consumption

b= MPC (ΔC/ΔY)

DIAGRAM ON NOTES

22
Q

What’s the Savings function denoted as?

A

Since income either consumed or saved Y = C + S and saving

S CAN BE WRITTEN AS:
S= Y - C= -A + (1-B)Y

DIAGRAM ON NOTES

23
Q

What happens when you combine the Savings function and Consumption function?

A

Combine the Consumption and Savings function with Income line too.

DIAGRAM ON NOTES

24
Q

What do the Consumption and Saving ratios look like?

A

APC:
C/Y= a/Y+b

APS:
S/Y= -a/Y + (1-b)

  • APC varies inversely with income
  • APS varies directly with income
25
Q

What are features of Desired Investment Spending

A
  • Investment most volatile part of GDP
  • Usually negatively related to the rate of interest
  • Keynes believed that business expectations were more important than investment
  • Assume investment exogenous i.e.Independent of income

DIAGRAMMATICALLY A HORIZONTAL LINE (IN NOTES)

26
Q

What does the Aggregate Expenditure (AE) look like normally and according to Keynes?

A

In economy without Govt. or trade Aggregate Expenditure (AE) function is: AE=C+I

According to Keynes level of AE determine level of output in economy:
AE=C+I+Y (GDP)

27
Q

What does the Investment look like with the AE function added?

A

DIAGRAM ON NOTES

28
Q

What does the Equilibrium Income Diagram look like?

A

DIAGRAM ON NOTES