2.2 Aggregate demand (AD) Flashcards
Aggregate demand
the total amount of spending on goods and services produced in an economy during a period of time.
AD = C + I + G + (X-M)
Consumption
total planned household spending
Disposable income
the income that households have to devote to consumption and saving, taking into account payments of direct taxes and transfer payments
Average propensity to consume
Proportion of income that households devote to consumption.
Marginal propensity to consume (MPC)
Proportion of additional disposable income households would devote to consumption
Marginal propensity to save (MPS)
Proportion of an increase in disposable income households would devote to saving
Influences on consumption
Level of real disposable income
- Rise means inc. spending & MPC
- Rise due to cut in income tax
Wealth effects
Where changes in household wealth induces changes in wealth expenditure
Households experience an inc. in the value of their assets holdings e.g. inc. house prices. MPC increases as they have the security of their property.
Consumer confidence - expectations about state of economy
Job prospects/level of unemployment, future inflation, times of recession/falling house prices
Interest rates (monetary policy) Increase in rate, inc. cost of borrowing, MPS higher
Time lags
Define wealth and income
Wealth: Accumulation of assets
Income: represents a flow
Investment
Expenditure undertaken by firms on capital goods.
Gross investment
Total investment
Gross investment = net investment plus depreciation of old capital i.e. cost of invest to replace
Net investment
Investment undertaken to increase a firms productivity capacity
Net investment = gross investment - capital depreciation
If net invest is +ve, firm will have higher prod. capacity & can meet rising demand in the future.
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Influences on investment
- Business confidence & expectations
- Gov influence & regulations; taxes
- Interest rates
- Access to credit
- Improved technology
Influences on investment:
Business confidence & expectations
Business confidence & expectations - overall state of economy
Expectations about future demand; high +ve outlook incentives investment i.e. at times of rapid economic growth as to exploit opportunities for profit or when expect high rate of return.
Keynes: ‘animal spirits’
instincts & emotions that influence people when making financial decisions, drives level of confidence in the economy
Expectations not only depend on state of domestic economy but international competitiveness (exports make up for lack of demand domestically)
Rate of economic growth
Influences on investment:
Government influence & regulations
Government influence & regulations
Gov has interest in encouraging investment; expands economy prod. capacity & economic growth
- Provide incentives as tax concessions
- Uses regulation to influence location/pattern of investment
Inflation could be damaging for economy
- high rate of inflation, inc. uncertainty for future
- dampen expectations, discourage investment.
Corporation tax; tax on firms’ profits
- lower corporation tax, higher retained profit
- use retained profits to invest