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06
An Introduction to Macroeconomics
.
McGraw-Hill/Irwin Copyright © 2012 by The McGraw-Hill Companies, Inc. All rights reserved.
Performance and Policy
• Real GDP
• Corrects for price changes
• Nominal GDP
• Uses current prices
• Unemployment
• Inflation
• Increase in overall level of prices
LO1 6-2
Performance and Policy
• Can governments:
• Promote economic growth?
• Reduce severity of recession?
• Is monetary or fiscal policy more effective at mitigating recession?
• Is there a tradeoff between inflation and unemployment?
• Is anticipated or unanticipated government policy more effective?
LO2 6-3
Performance and Policy
• Output growth
• 2.7% per year 1995-2007
• Unemployment rate
• 4.6% in 2007
• Inflation rate
• 2.7% in 2007
LO2 6-4
Modern Economic Growth
• Standard of living measured by output per person
• No growth in living standards prior to Industrial Revolution
• Modern economic growth
• Output per person rises
• Not experienced by all countries
LO3 6-5
Global Perspective
LO3 6-6
Savings and Investment
• Saving
• Trade-off current for future consumption
• Investment
• Financial investment
• Economic investment
• Banks and financial institutions
LO4 6-7
Uncertainty, Expectations, and Shocks
• The future is uncertain
• Expectations affect investment
• Shocks
• What happens is not what you expected
• Demand shocks
• Supply shocks
LO5 6-8
Uncertainty, Expectations and Shocks
• Demand shocks and flexible prices
• Price falls if demand is low
• Sales unchanged
• Demand shocks and sticky prices
• Maintain inventory
• Sales change
• Business cycles
LO5 6-9
Demand Shocks
Cars per week
Pri
ce
DMDL
DH
900
$40,000
$37,000
$35,000
Flexible Prices
LO5 6-10
Demand Shocks
Cars per week
DMDL
DH
700 900 1150
$37,000
Fixed Prices
Pri
ce
LO5 6-11
Sticky Prices
LO5
Item MonthsCoin-operated laundry machines 46.4
Newspapers 29.9
Haircuts 25.5
Taxi fare 19.7
Veterinary services 14.9
Magazines 11.2
Computer software 5.5
Beer 4.3
Microwaves ovens 3.0
Milk 2.4
Electricity 1.8
Airline tickets 1.0
Gasoline 0.6Source: Mark Bils and Peter J. Klenow, “Some Evidence on the Importance of Sticky Prices”, Journal of Political Economy, October 2004, pp 947-985, Used with permission of The University of Chicago Press.
6-12
Sticky Prices
• Many prices are sticky in the short run
• Consumers prefer stable prices
• Firms want to avoid price wars
• All prices are flexible in the long run
• Firms adjust to unexpected, but permanent changes in demand
LO5 6-13
Inventory Management
• Computerized inventory tracking
• Unexpected changes in demand are easier to observe
• Firms make better output and employment decisions
• Less severe business cycles
• Before 2007, only two mild recessions since adoption
• Possible explanationLO5 6-14