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Chapter 12
Chapter 12 - Aggregate Demand and Aggregate Supply Analysis
35
Economics
Undergraduate 1
04/29/2009

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Term
Aggregate
Definition
A collection of items gathered together to form a total quantity; a sum of things.
Term
Aggregate demand
Definition
The total demand for final goods and services (GDP) in the economy at a given time and price level.
Term
Fluctuations in real GDP cause...
Definition
fluctuations in unemployment.
Term
Aggregate demand and aggregate supply model
Definition
Explains short-run fluctuations in real GDP and price level.
Term
In the short-run, real GDP and the price level are determined by...
Definition
the intersection of the AD curve and the SRAS curve.
Term
Fluctuations in real GDP and the price level are caused by...
Definition
SHIFTS in the AD curve or SRAS curve.
Term
Aggregate demand curve
Definition
shows the relationship between price level and the quantity of real GDP DEMANDED by households, firms, and the government.
Term
Short-run aggregate supply curve
Definition
shows the relationship in the short-run between price-level and the quantity of real GDP SUPPLIED by firms.
Term
The AD curve is downward sloping because...
Definition
a fall in price level INCREASES the quantity of real GDP DEMANDED.
Term
Out of the four variables that sum up GDP (C, I, G, NX), which one is unaffected by changes in price level?
Definition
Government spending. They are unaffected by price level changes. They are determined by policy decisions of lawmakers.
Term
Wealth effect affects...
Definition
Consumption (Is affected by what effect?).
Term
Household wealth
Definition
The difference between the values of assets and debts.
Term
Higher household wealth leads to...
Definition
higher consumption.
Term
Nominal assets
Definition
these assets lose value as price level increases and gain values as price level decreases.
Term
As price level rises, real value of household wealth...
Definition
the real value of household wealth decreases (as _______ rises).
Term
As price level rises, nominal assets lose value, and consequently households...
Definition
Households do not consume as much when _______ rises. This is due to the decline in the real value of their household wealth.
Term
As price level rises, what happens to consumption?
Definition
Consumption decreases as price level rises (based on WEALTH EFFECT).
Term
As price level increases, what happens to investment?
Definition
Investment tends to decrease when _________ rises because interest rates of banks increase (due to the fact that more people are withdrawing in response to the increase in price level--they need more money).
Term
What does a high price level do to net exports?
Definition
NX decreases as ________ increases. Exports become more expensive; imports become less expensive. Foreigners buy their own products and [Americans] also buy their own products (imports).
Term
Price level has what type of relationship with consumption, investment, and net exports?
Definition
Inverse relationship. As price level increases, consumption, investment, and net exports all decrease.

GDP DECREASES AS PRICE LEVEL INCREASES!
Term
Price level causes what to happen to the AD and SRAS curve?
Definition
Movements occur due to change in what?
Term
SHIFTS to the AD and SRAS curve occur due to...
Definition
When other variables OTHER THAN price level change, AD and SRAS curves start to ______ rather than a movement occurring along them.
Term
The three variables that SHIFT the AD curve are...
Definition
Changes in government policies.
Changes in the expectations of households and firms.
Changes in foreign variables.
Term
Changes in government policies that SHIFT the AD curve include...
Definition
Increase in interest rates (LEFTWARD SHIFT).
Increase in government purchases (RIGHTWARD SHIFT).

These two variables fall under the change of ______________ that (shift or move?) the AD curve.
Term
Changes in the EXPECTATIONS OF HOUSEHOLDS AND FIRMS that SHIFT the AD curve include...
Definition
As the expectation/optimism of households' future incomes increases, consumption increases (RIGHTWARD SHIFT).

As the expectation/optimism of firms' future profitability increases, investment spending increases (RIGHTWARD SHIFT).

These two variables fall under the change of ______________ that (shift or move?) the AD curve.
Term
Changes in FOREIGN VARIABLES that SHIFT the AD curve include...
Definition
The growth rate of domestic GDP increases OVER the growth rate of foreign GDP, resulting in the fall of exports and the overall reduction of net exports (LEFTWARD SHIFT).

An increase in the exchange rate of the US dollar compared to other foreign currencies results in the increase of imports and decrease of exports, hence net exports decreases (LEFTWARD SHIFT).

These two variables fall under the change of ______________ that (shift or move?) the AD curve.
Term
Long run aggregate supply curve is shaped how?
Definition
The long run aggregate supply curve is a vertical line which is not affected by price level.
Term
The long run aggregate supply curve (LRAS) shows
Definition
this curve shows the relationship in the long run between price level and the quantity of real GDP supplied.
Term
The long run aggregate supply curve is a vertical line because...
Definition
Price level has no effect on real GDP in the long run. In the long run, real GDP is affected by the number of workers, capital stock, and available technology.
Term
The short run aggregate supply curve (SRAS) shows
Definition
this curve shows in the short run, the relationship between price level and the amount of real GDP supplied by firms.
Term
The short run aggregate supply curve is upward sloping because
Definition
As price level rises, firms are more willing to supply more goods and services. This results in the SRAS curve to slope (Down or up?)
Term
Firms are more willing to supply goods and services when the price level rises because...
Definition
As the price level rises, profits rise faster than the prices needed to be paid for inputs (wages of workers or prices of natural resources).
Term
Firms are more willing to supply goods and services when the price level increases also because...
Definition
Some firms are slow to update their prices, will experience an increase in sales (due to unchanged, lower prices), and increase production.
Term
The failure of workers and firms to predict the price level in the future results in the upward slope of the SRAS. This is due to three reasons:
Definition
1. Contracts make some wages and prices "sticky" - contracts and wages are held constant when agreed upon, but demand for production may increase or decrease.

2. Firms are slow to adjust wages - same as 1 pretty much.

3. Menu costs make some prices sticky - menu costs are the costs to firms of changing prices. Some firms may print menus or catalogs depicting their prices, and if price level changes, they may be unable or unwilling to change those prices listed. Some firms may have fixed, low prices, but will increase production.
Term
5 variables that shift the SRAS curve:
Definition
1. Increase in labor force and capital stock (supply more output as labor force increases; SRAS shifts right).
2. Increase of technological change (as technology increases, productivity increases; SRAS shifts right).
3. Expected changes in FUTURE PRICE LEVEL (SRAS shifts left as workers adjust their wages to increase relative to rising price level).
4. Adjustments of workers and firms to errors in past expectations about the price level (SRAS shifts left as workers' wages increase relative the increasing price level).
5. Unexpected changes in the price of an important natural resource (increase in price of natural resource, cost of producing output rises; SRAS shifts left).
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