01 Limits, Alternatives, and Choices McGraw-Hill/Irwin Copyright © 2012 by The McGraw-Hill Companies, Inc. All rights reserved. Introduction • LO1 Economics defined: • Economic wants exceed productive capacity. • A social science concerned with making optimal choices under conditions of scarcity. 1-2 The Economic Perspective • • Thinking like an economist Key features: • • • LO1 Scarcity and choice Purposeful behavior Marginal analysis 1-3 Scarcity and Choice • • • Resources are scarce Choices must be made Opportunity cost • LO1 There’s no free lunch 1-4 Purposeful Behavior • • • • LO1 Rational self-interest Individuals and utility Firms and profit Desired outcomes 1-5 Marginal Analysis • • • • LO1 Marginal benefit Marginal cost Marginal means “extra” Comparison between marginal benefit and marginal cost 1-6 Theories, Principles, and Models • The scientific method: Observe Formulate a hypothesis Test the hypothesis Accept, reject, or modify the hypothesis Continue to test the hypothesis, if necessary • Economic principles • • • LO2 Generalizations Other-things-equal assumption Graphical expression 1-7 Microeconomics and Macroeconomics • Microeconomics • • Macroeconomics • LO3 Decision making by individual units Aggregate 1-8 Positive and Normative Economics • Positive economics • • Normative economics • LO3 Deals with economic facts A subjective perspective of the economy 1-9 Individual’s Economizing Problem • • • Limited income Unlimited wants A budget line • • • • LO4 Attainable and unattainable options Tradeoffs and opportunity costs Make the best choice possible Change in income 1-10 Individual’s Economizing Problem 12 DVDs Books $20 $10 10 6 5 4 3 2 1 0 0 2 4 6 8 10 12 Quantity of DVDs $120 Budget Income = $120 =6 Pdvd = $20 8 Unattainable 6 Income = $120 = 12 Pb = $10 4 2 0 Attainable 2 4 6 8 10 12 Quantity of Paperback Books LO4 14 1-11 Global Perspective LO4 1-12 Society’s Economizing Problem • Scarce resources • • • • LO4 Land Labor Capital Entrepreneurial Ability 1-13 Society’s Economizing Problem • Entrepreneurial ability • Takes initiative • Makes decisions • Innovates • Takes risk LO4 1-14 Production Possibilities Model • • Illustrates production choices Assumptions: • • • • LO5 Full employment Fixed resources Fixed technology Two goods 1-15 Production Possibilities Table Production Alternatives Type of Product Pizzas A B C D E 0 1 2 3 4 10 9 7 4 0 (in hundred thousands) Industrial Robots (in thousands) Plot the Points to Create the Graph… LO5 1-16 Industrial Robots Production Possibilities Curve 14 13 12 11 10 9 8 7 6 5 4 3 2 1 The law of increasing opportunity costs makes the PPC concave. A B Unattainable C D U Attainable E 0 1 2 3 4 5 6 7 8 9 Pizzas LO5 1-17 Marginal Benefit & Marginal Cost Optimal Allocation MC 15 a c MB = MC e 10 5 b d MB 0 1 LO5 2 Quantity of Pizza 3 1-18 A Growing Economy • Economic Growth • • • LO6 More resources Improved resource quality Technological advances 1-19 A Growing Economy Production Alternatives Type of Product Pizzas A' B' C' D' E' 0 2 4 6 8 14 12 9 5 0 (in hundred thousands) Industrial Robots (in thousands) LO6 1-20 Industrial Robots A Growing Economy A’ 14 13 12 11 10 9 8 7 6 5 4 3 2 1 B’ Unattainable A Economic Growth C’ B C D’ D Now Attainable Attainable E’ E 0 1 2 3 4 5 6 7 8 9 Pizzas LO6 1-21 Future Curve Current Curve P Goods for the Present Presentville LO6 Goods for the Future Goods for the Future Present Choices, Future Possibilities Future Curve F Current Curve Goods for the Present Futureville 1-22 International Trade • Specialization • Increased production possibilities LO6 1-23 Pitfalls to Sound Economic Reasoning • Biases • Loaded terminology • Fallacy of composition • Post hoc fallacy • Correlation not causation 1-24