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Marginal Propensity to Consume (MPC)
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how much people consume rather than save when there is a change in income
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Formula for MPC
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change in consumption / change in income
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Marginal Propensity to Save (MPS)
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how much people save rather than consume when there is a change in income
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Formula for MPS
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change in savings / change in income
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MPS + MPC =
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1
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What is the reasoning for the formula MPS + MPC = 1?
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whatever people won't spend, they save and vice versa
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The higher the MPC, the larger the _______ _________
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multiplier effect
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What are the 5 determinants of consumption?
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1. disposable income
2. wealth
3. future expectations
4. taxes
5. real interest rates
2. wealth
3. future expectations
4. taxes
5. real interest rates
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As disposable income rises, consumption ________
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rises
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As disposable income falls, consumption _______
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falls
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As wealth rises, consumption ______
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rises
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As wealth falls, consumption ________
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falls
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As expectations are positive, consumption __________
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rises
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As expectations are negative, consumption _______
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falls
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As taxes fall, consumption ____
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rises
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As taxes rise, consumption _____
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falls
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As real interest rates fall, consumption ____
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rises
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As real interest rates rises, consumption ____
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falls
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What does the investment graph compare?
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real interest rate: investment
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Is the investment graph positive or negative?
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negative
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What are the 6 determinants of investment?
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1. business costs
2. corporate taxes
3. technology
4. capacity level
5. business confidence
6. real interest rates
2. corporate taxes
3. technology
4. capacity level
5. business confidence
6. real interest rates
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As business costs fall, investment ____
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rises
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As business costs rises, investment ____
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falls
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As corporate taxes fall, investment ____
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rises
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As corporate taxes rise, investment ____
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falls
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As technology improves, investment ____
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rises
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As capacity level falls, investment ___
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rises
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As capacity level rises, investment _____
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falls
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As business confidence rises, investment _____
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rises
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As business confidence falls, investment _____
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falls
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As real interest rate falls, investment ____
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rises
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As real interest rate rises, investment ____
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falls
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What are the 3 determinants of net exports (Xn)?
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1. national income
2. relative prices
3. exchange rates
2. relative prices
3. exchange rates
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As foreign national income rises, Xn ____
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rises
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As foreign national income falls, Xn _____
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falls
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As domestic income falls, Xn _____
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rises
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As domestic income rises, Xn ____
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falls
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As the relative prices of foreign goods rises, Xn ____
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rises
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As the relative prices of foreign goods falls, Xn ____
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falls
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As the domestic currency becomes weaker, Xn _____
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rises
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As the domestic currency becomes stronger, Xn ____
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falls
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Multiplier Analysis
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A change in initial spending has a multiplied effect on Real GDP
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The idea of the multiplier analysis is that spending for one is
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income for the next
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Formula for multiplier effect
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1/(1-MPC) or 1/ MPS
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Formula to find the increase/decrease to real GDP
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Change in real GDP = change in spending * multiplier
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Aggregate
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added all together (all prices and quantities)
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Aggregate demand
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all the goods and services (real GDP) that buyers are willing and able to purchase at different price levels
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What is the relationship between price level and real GDP in aggregate demand?
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inverse (negative slope)
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If price level increases (inflation), then real GDP demanded ____
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falls
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If price level decreases (deflation), then real GDP demanded
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increases
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AD =
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C + I + G + Xn
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What are the 3 effects responsible for the downward slope of aggregate demand?
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1. wealth effect
2. interest rate effect
3. foreign trade effect
2. interest rate effect
3. foreign trade effect
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Wealth effect
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higher price levels reduce the purchasing power of money and decreases the quantity of expenditures
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Interest-rate effect
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when the price level increases, lenders need to charge higher interest rates to get a REAL return on their loans
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In the interest-rate effect, higher interest rates ____
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discourage consumer spending and business investment
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Foreign trade effect
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When US price level rises, foreign buyers buy fewer US goods and Americans buy more foreign goods
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What happens to exports and imports in the foreign trade effect?
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If US price levels rise, exports fall and imports rise causing real GDP demanded to fall
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In an AD curve, an increase in spending shifts the curve to the
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right
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In an AD curve, a decrease in spending shifts the curve to the
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left
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What are the 4 shifters of Aggregate Demand?
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1. change in consumer spending
2. change in investment spending
3. change in government spending
4. change in net exports
2. change in investment spending
3. change in government spending
4. change in net exports
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Change in consumer spending (4)
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1. increase in disposable income
2. consumer expectations
3. household indebtedness
4. taxes
2. consumer expectations
3. household indebtedness
4. taxes
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Change in investment spending (4)
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1. real interest rates
2. future business expectations
3. productivity and technology
4. business taxes
2. future business expectations
3. productivity and technology
4. business taxes
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Change in government spending
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government expenditures (defense spending, public works programs)
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Change in net exports (2)
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1. exchange rates
2. national income compared to abroad
2. national income compared to abroad
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Aggregate supply
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the amount of goods and services (real GDP) that firms will produce in an economy at different price levels
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Short-run aggregate supply
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wages and resource prices will NOT increase price levels increase
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In short run aggregate supply, if they have higher profits, the firm _____
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has the incentive to increase production
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Long-run aggregate supply
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wages and resource prices will increase as price levels increase
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Shifters in Aggregate Supply (3)
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1. change in resource prices
2. change in actions of the government
3. change in productivity
2. change in actions of the government
3. change in productivity
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Change in resource prices (3)
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1. prices of domestic and imported goods (increase or decrease in Canadian lumber)
2. supply shock (+ / -)
3. inflationary expectations
2. supply shock (+ / -)
3. inflationary expectations
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Example of inflationary expectations
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If producers expect higher prices in the future, workers will demand higher wages and costs will increase therefore decreasing aggregate supply
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Change in actions of the government (3)
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1. taxes on producers
2. subsidies for domestic producers
3. government regulations
2. subsidies for domestic producers
3. government regulations
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Change in productivity
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technology
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Increase in AD
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price levels increase, rGDP increase
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Decrease in AD
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price levels decrease, rGDP decrease
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Increase in AS
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price level decrease, rGDP increase
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Decrease in AS
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price level increase, rGDP decrease