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Circular Flow & GDP. How the U.S. Economy works. Branches of Economics. Microeconomics --studies economic behavior & decision making of small units: individuals, families, businesses Macroeconomics --studies economic behavior & decision making of entire economies.
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Circular Flow & GDP How the U.S. Economy works
Branches of Economics • Microeconomics --studies economic behavior & decision making of small units: individuals, families, businesses • Macroeconomics --studies economic behavior & decision making of entire economies Analyzing Sony’s $100 price cut for PS3 Analyzing how a federal income tax cut has affected unemployment
Key Concept: Circular Flow • Describes how goods, services and money flow through a free market economy
Product Market Circular Flow PRODUCERS CONSUMERS Factor Market
The U.S. Free Market Economy Boeing cuts 1000 jobs Price of oil goes down Product Market Where goods & services sold Make products Pay for products CONSUMERS PRODUCERS Circular Flow labor Wages/paycheck Factor Market (Factors of Production) --land, labor, capital, education/skills are exchanged Income tax rebate $700 Interest rates go up
Measuring the Circular Flow: GDP • The total dollar value of economic output of the circular flow is called Gross Domestic Product (GDP) • Dollar Value of all FINALnew goods & services produced in USA over one year
How to Calculate GDP GDP = C + I + G + (X-M)
GDP is a very IMPERFECT measure—it does NOT Measure: Leisure time v. hours worked What is produced—shoes, guns, toys count the same How happy or content people are
GDP Growth Rate • Instead we use the percentage growth rate (measured quarterly and annually) • Example: GDP grew last year at a +2.2% rate last quarter GDP #s are hard for our minds to grapple with: GDP increased from $13.2 trillion to $13.5 trillion; DOES NOT COMPUTE!
GDP growth: Speed Limits • Too fast: If GDP grows above 5.0%, the economy may experience inflation • Prices rise • Too slow: If GDP grows below 2%, not enoughjobs are created • Unemployment rate increases
Gross Domestic Product (GDP) Growth Rate • Slowest ever -13.0% (1932) • Fastest ever +18.5% (1942) • Historical average: +2.5%-3.0% Recent GDP Growth Rates: 1Q 2008: +0.9% 2Q 2008 +2.8% 3Q 2008 -0.5% 4Q 2008 -6.5% 1Q 2009: -6.4% 2Q 2008 -0.7% 3Q 2008 +2.2%