2.2 aggregate demand Flashcards
what is aggregate demand?
the total level of spending in the economy at any given price
what are 4 components of AD?
consumption
investments
government spending
net exports
what % of AD is comprised of each component?
consumption - 60%
investments - 15%
government spending - 20%
net exports - 5%
explain why a 1% increase in consumption would have a bigger impact on the economy than a 1% increase in investment
consumption takes up a larger percentage of AD
gice the reasons why the AD curve is downward sloping
income effect
sustitution effect
real balance effect
interest rate effect
what could have caused a contraction in the AD curve?
what could have caused an expansion in the AD curve?
define consumption
spending on consumer goods and services over a period of time
define disposable income
the money consumers have left to spend , after taxes have been taken away and any state benefits have been added
explain the relationship between disposable income and consumption
the consumption function shifts forward (or upward) when disposable income or accumulated wealth also increases
explain the relationship between savings and consumption
an increase in consumption decreases savings so the same factors which affect consumption are those which affect savings - but in the opposite way. For example, a rise in confidence will decrease savings
how is the (household) savings ratio calculated?
- the household saving rate is defined as gross household saving divided by gross disposable income, with the latter being adjusted for the change in pension entitlement of households
- gross saving is the part of the gross disposable income which is not spent as final consumption expenditure
- the household savings ratio is calculated by dividing household savings by household disposable income
give the reasons why interest rates and consumption are inversely related
- most major expenditures are bought on credit so therefore the interest rate will affect the cost of the good for consumers
- if interest rates are high, the price of the good will effectively be higher since more interest needs to be paid back and this will lead to a reduction in consumption
- high interest rates also increase mortgage repayments so reduce consumption
- a rise in interest rates decreases the value of shares and so people experience a negative wealth effect
explain the relationship between confidence and consumption
- if people are confident about the future and expect pay rises, then they will continue or increase their spending
- if they expect high levels of inflation in the future, they will buy now as it will be at a cheaper price, so consumption will increase
- if they expect a recession and fear possible unemployment, consumption will decrease as people may save more
- expectations about a change in the taxation level will affect consumption: if consumers expect tax to increase prices in the future, they will buy now whilst if they expect it to reduce prices in the future, they will delay their purchases
- similarly, expectations on interest rates will affect consumption: if consumers expect interest rates to fall they may delay their purchases as things on credit will be cheaper
define wealth
a stock of assets
explain how changes in wealth may change consumption
- people with greater wealth tend to have greater levels of consumption, known as the wealth effect: a change in consumption following a change in wealth
- the wealth effect is experienced when real house prices rise as owners now have more wealth so are more confident with spending as they know that if they go into financial difficulty they could simply borrow more against the house, since their house is worth more than their current mortgage
- it can also be experienced when share prices rise as people may sell some of their shares and spend the money or may be more confident in spending the money they have as they know they have the shares to fall back on in case of financial difficulty
- greater wealth will improve a consumer’s confidence and thus lead to greater spending
explain how distribution of income may affect consumption
- those on high incomes tend to save a higher percentage of their income than those on low incomes and so a change in the distribution of money in the economy will affect the level of consumption
- if money is moved from the rich to the poor, consumption is likely to increase as the poor have a higher MPC
explain how tastes and attitudes may affect consumption
- in our modern society, there is a strong materialistic drive that encourages people to have the newest and the best and therefore spending can be very high, in some cases even above income
- if people were less materialistic, consumption would decrease
define investment
the addition of capital stock to the economy i.e. machines and factories used to produce other goods and services
explain the difference between net and gross investment
gross investment - the amount of investment carried out and ignores the level of depreciation
net investment - gross investment minus the value of depreciation