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TRANSCRIPT
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Macroeconomics The study of the aggregate economy
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Today’s goals 1. Discuss factors that affect GDP components.
2. Go into more depth on circular flow.
3. Tie together GDP and circular flow.
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Measuring
aggregate demand
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Keep in mind:
Aggregate means
whole or total
Therefore aggregate demand =
total demand for all goods and services
from all sectors of the economy.
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Or put another way:
AD = C + I + G + (X - M)
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C = Consumption
• Affected by such things as:
★Income and wealth
★Interest rates
★Expectations of the future
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I = Investment
• Affected by such things as:
★Interest rates
★Government policies
★Expectations
of the future
•includes purchases of machines,
new buildings, additions to inventories
★Technology,
depreciation levels
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G = Government spending
• Affected by such things as:
★Debt servicing costs
★Social service needs and
transfer payment requirements
★Requirements for new spending
on capital works (i.e. infrastructure)
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X - M = The trade balance • Affected by such things as:
★Currency rates
★Barriers to trade
★Trade blocs and agreements
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Circular Flow Model
of the Economy
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Product Market (finished goods and services)
Households Businesses
Resource Market (land, labour, capital)
Businesses
purchase
resources
Households
receive
payment for
resources
Households
purchase
goods and
services
Consumption
of goods and
services puts
money back
into businesses
This represents
the C + I portion
of the aggregate demand
equation
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Product Market (finished goods and services)
Households Businesses
Resource Market (land, labour, capital)
Now to
factor in
the “G”
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Product Market (finished goods and services)
Households Businesses
Resource Market (land, labour, capital)
GOVERNMENT
Gov’t
Spending on
Social
Services
Gov’t Spending
on Corporations
Taxes
Taxes
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Product Market (finished goods and services)
Households Businesses
Resource Market (land, labour, capital)
Also, the
trade balance
(X - M)
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Product Market (finished goods and services)
Households Businesses
Resource Market (land, labour, capital)
GOVERNMENT
Gov’t
Spending on
Social
Services
Gov’t Spending
on Corporations
Taxes
Taxes
Imports (money going
out of the
country)
Exports (money coming
into the country)
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Product Market (finished goods and services)
Households Businesses
Resource Market (land, labour, capital)
GOVERNMENT
Gov’t
Spending on
Social
Services
Gov’t Spending
on Corporations
Taxes
Taxes
Imports (money going
out of the
country)
Exports (money coming
into the country)
Finally - the Banking Sector must be
factored in as a means on deferring
spending
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Product Market (finished goods and services)
Households Businesses
Resource Market (land, labour, capital)
GOVERNMENT
Gov’t
Spending on
Social
Serivces
Gov’t Spending
on Corporations
Taxes
Taxes
Imports (money going
out of the
country)
Exports (money coming
into the country)
Savings
Savings
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As you can see - some factors contribute to
the economy and some take from it.
Leakages Injections
•Savings
•Taxes
•Imports
•Spending
•Gov’t.
Spending
•Exports
This is referred to as leakages and injections
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• Stable economy
• Rising Economy
• Falling Economy
Leakages = Injections
Leakages < Injections
Leakages > Injections
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and thus ...
measurement and
evaluation of
economic activity.
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Production • Most commonly measured as
Gross Domestic Product (GDP)
The value at market prices
of all final goods, services
produced in U.S. by both
U.S.- and foreign-owned
businesses.