Introduction to Economics

1. Introduction to Economics Barbulean

2. Instructional Method • Suggestions for the study of economics • Read the book before coming to class • Recopy lectures and reread the book within several hours of class • Identify what you don’t understand • Ask questions in class • Use the online study guide • Visit the professor during office hours

3. Definition of Economics • Mankiw’s definition • How Society manages its scarce resources • Hedrick’s definition • How society chooses to allocate its scarce resources among competing demands to best satisfy human wants • Alternative definitions • Economics is the study of choice. • Economics is what economist do. • Wikipedia's perspective

4. Scarcity and the Fundamental Questions of Economics • Scarcity : Unlimited wants versus limited resources • Choices and tradeoffs • Opportunity Costs • All societies must answer these questions • What is to be produced? • How is to be produced? • For whom will it be produced?

5. Economics as a Science • The Scientific Method • Observation →Hypothesis →Testing • Observation: identifying and measuring important variables – orderly loss of information • Hypothesis: educated guesses about cause and effect with the variables • Theories • Models: realism or usefulness • Testing: theories can’t be proven and are supported by repeated failed attempts to disprove them. • Microeconomics vs. Macroeconomics • The Assumption of Rational Behavior • Boxes Example • People respond to incentives • Limits to the use of rational behavior (e.g. axe murders)

6. Greg Mankiw’sTen Principles of Economic Thinking http://gregmankiw.blogspot.com/

7. Categories of Basic Principles of Economics • How people make decisions? • How people interact? • How does the economy work overall?

8. How People Make Decisions • Principle #1 - People face tradeoffs • Time allocation – an example of tradeoffs • Production Possibilities Frontier • Efficiency versus equity

9. How People Make Decisions • Principle #2 - The cost of something is what you have to give up to get it • Opportunity costs come from Von Weiser, a German economist late 1800s • Opportunity costs are independent of monetary units • TINSTAAFL • The real costs of going to college

10. How People Make Decisions • Principle #3 - Rational people think at the margin • Rational or irrational decision-making • Marginal benefits and costs versus total benefits and costs • Weighing marginal costs and benefits leads to maximizing net benefits (total welfare)

11. How People Make Decisions • Principle #4 –People respond to incentives • Reactions to changes in marginal benefits and costs • Increases (decreases) in marginal benefits mean more (less) of an activity • Increases (decreases) in marginal costs mean less (more) of an activity • Example of seat belts leading to increased speeds • Example of SUV (with child car seat) in Issaquah

12. How People Interact • Principle #5 - Trade can make everybody Societybetter off • Adam Smith author of the “An Inquiry into the Causes and Consequences of the Wealth of Nations” 1776 • Gains from the division of labor and specialization • Mercantilists perspectives • Example of why Ellensburgians should trade with others

13. How People Interact • Principle #6 - Markets are usually a good way of organizing economic activity • Feudal times and haciendas in the new world • The power of trade: cooperation versus conflict • Markets: prices and quantities traded, typical and abstract

14. How People Interact • Principle #6 - Markets are usually a good way of organizing economic activity creativity and productivity and resource allocation • “Failure” of centrally planned economies • “set it and forget it” becomes “compete or be obsolete”

15. How People Interact • Principle #7 Governments can sometimes improve market outcomes • Market signals can fail to allocate resources efficiently or equitably • Public goods, the exclusion principle, the free-rider problem and non-rival consumption • External costs and benefits • Examples: vaccines, education, pollution

16. How People Interact • Principle #7 Governments can sometimes improve market outcomes • Equitable or fair distribution of resources • Efficiency and equity: the pie analogy • Government Failure: is government intervention always the proper solution?

17. How the Economy works as a Whole • Principle # 8 – A country’s standard of living depends upon its ability to produce goods and services • Adam Smith’s “An Inquiry into the Nature and the Consequences of the Wealth of Nations” • Materialism – more toys mean more welfare • wealth: a necessary or sufficient condition for happiness (are rich people happier, children with lots of toys)

18. How the Economy works as a Whole • Principle # 8 – A country’s standard of living depends upon its ability to produce goods and services • leisure time and productivity • the factors of production: land or natural resources, labor, capital, entrepreneurship • technology and productivity • the Rule of 72 and growth rates

19. How the Economy works as a Whole • Principle #9 – The general level of prices rises when the government prints and distributes too much money • Definition of money, and economic language

20. How the Economy works as a Whole • Principle #9 – The general level of prices rises when the government prints and distributes too much money • Examples: “Not worth a continental” and Argentina • Establish of the Federal Reserve and the introduction of sustained inflation in the US

21. How the Economy works as a Whole • Principle #10 – Society faces a short-run tradeoff between inflation and unemployment • Short-run and the long-run • Demand and supply shocks • Short-run increases (decreases) in output above (below) long-run potential output lead to adjustments

22. The Concept of Opportunity Cost • Opportunity cost of any choice • What we forego when we make that choice • Most accurate and complete concept of cost • Direct money cost of a choice may only be a part of opportunity cost of that choice • Opportunity cost of a choice includes both explicit costs and implicit costs • Explicit cost—dollars actually paid out for a choice • Implicit cost—value of something sacrificed when no direct payment is made

23. Opportunity Cost and Society • All production carries an opportunity cost • To produce more of one thing • Must shift resources away from producing something else • The Principle of Opportunity Cost • The concept of opportunity cost sheds light on virtually every problem that economists study, whether it be explaining the behavior of consumers or business firms or understanding important social problems like problems like poverty or racial discrimination • Basic Principle #2: Opportunity Cost • All economic decisions made by individuals or society are costly • The correct way to measure the cost of a choice is its opportunity cost—that which is given up to make the choice

24. At point A, all resources are used for "other goods." Quantity of All Other Goods per Period Moving from point A to point B requires shifting resources out of other goods and into health care. 1,000,000 950,000 850,000 700,000 At point F. all resources are used for health care. 500,000 400,000 100,000 200,000 300,000 400,000 500,000 Number of Lives Saved per Period Figure 1: The Production Possibilities Frontier A B C D E W F

25. Increasing Opportunity Cost • According to law of increasing opportunity cost • The more of something we produce • The greater the opportunity cost of producing even more of it • This principle applies to all of society’s production choices

26. Recessions • A slowdown in overall economic activity when resources are idle • Widespread unemployment • Factories shut down • Land and capital are not being used • An end to the recession would move the economy from a point inside its PPF to a point on its PPF • Using idle resources to produce more goods and services without sacrificing anything • Can help us understand an otherwise confusing episode in U.S. economic history

27. Recessions • During early 1940s, standard of living in U.S. did not decline as we might have expected but actually improved slightly. Why? • U.S. entered World War II and began using massive amounts of resources to produce military goods and services • Instead of pitting “health care” against “all other goods,” we look at society’s choice between military goods and civilian goods • U.S. was still suffering from the Great Depression when it entered WWII • Joining war effort helped end the Depression and moved economy from a point like A, inside the PPF, to a point like B, on the frontier • Military production increased, but so did the production of civilian goods • Although there were shortages of some consumer goods • Overall result was a rise in the material well-being of the average U.S. citizen • War is only one factor that can reverse a downturn • No rational nation would ever choose war as an economic policy designed to cure a recession • Alternative policies that virtually everyone would find preferable

28. 1. Before WWII the United States operated inside its PPF . . . Military Goods per Period 2. then moved to the PPF during the war. Both military and civilian production increased. Civilian Goods per Period Figure 2: Production and Unemployment B A

29. Economic Growth • If economy is already operating on its PPF • Cannot exploit opportunity to have more of everything by moving to it • But what if the PPF itself were to change? Couldn’t we then produce more of everything? • This happens when an economy’s productive capacity grows • Many factors contribute to economic growth, but they can be divided into two categories • Quantities of available resources—especially capital—can increase • An increase in physical capital enables economy to produce more of everything that uses these tools • More factories, office buildings, tractors, or high-tech medical equipment • Same is true for an increase in human capital • Skills of doctors, engineers, construction workers, software writers, etc. • Technological change enables us to produce more from a given quantity of resources

30. Economic Growth • Increases in capital and technological change often go hand in hand • For instance, PET body scanners will enable us to save even more lives than our current set of resources • Moving horizontal intercept of PPF rightward, from F to F‘ • Impact of PET scanners stretches PPF outward along horizontal axis • How can a technological change in lifesaving enable us to produce more goods in other areas of the economy? • Society can choose to use some of increased lifesaving potential to shift other resources out of medical care and into production of other things • Because of technological advance and new capital, we can shift resources without sacrificing lives

31. Economic Growth • If we can produce more of the things that we value, without having to produce less of anything else, have we escaped from paying an opportunity cost? • Yes . . . and no • Figure 3 tells only part of story • Leaves out steps needed to create this shift in the PPF • For example, technological innovation doesn’t just “happen”—resources must be used to create it • Mostly by research and development (R&D) departments of large corporations • In order to produce more goods and services in the future, we must shift resources toward R&D and capital production • Away from production of things we’d enjoy right now

32. 1. A technological advance in saving lives increases this PPF's horizontal intercept . . . Quantity of All Other Goods per Period 4. or more lives saved and greater production of other goods. 3. The economy can end up with more lives saved and un-changed production of other goods . . . 2. But not its vertical intercept. Number of Lives Saved per Period Figure 3: The Effect of a New MedicalTechnology A 1,000,000 J H 700,000 D F F' 300,000 500,000 600,000

33. Efficiency • In production, we’d like to have productive efficiency – achieving as much output as possible from a given amount of inputs or resources. • Efficiency involves achieving a goal as cheaply as possible. • Efficiency has meaning only in relation to a specified goal.

34. Efficiency • Any point within (INSIDE) the production possibility curve represents inefficiency. • Inefficiency – getting less output from inputs which, if devoted to some other activity, would produce more output. • Unattainable -Any point outside the production possibility curve represents something unattainable, given present resources and technology.

35. Unattainable point, given available technology, resources and labor force 10 8 C D Efficient points 6 Guns B 4 A Inefficient point 2 0 2 4 6 8 10 Butter Efficiency and Inefficiency

36. Tom’s Trade-offs: The Production Possibility Frontier

37. Shifts in the Production Possibility Curve • Society can produce more output if: • Technology is improved. • More resources are discovered. • Economic institutions get better at fulfilling our wants.

38. Economic Growth Economic growth results in an outward shift of the PPF because production possibilities are expanded. The economy can now produce more of everything. Production is initially at point A (20 fish and 25 coconuts),  it can move to point E (25 fish and 30 coconuts).

39. C D Shifts in the Production Possibility Curve Neutral Technological Change Butter A 0 B Guns

40. C Shifts in the Production Possibility Curve Biased Technological Change Butter B 0 A Guns

41. Specialization and Exchange • Specialization • Method of production in which each person concentrates on a limited number of activities • Exchange • Practice of trading with others to obtain what we want • Allows for • Greater production • Higher living standards than otherwise possible • All economics exhibit high degrees of specialization and exchange

42. Further Gains to Specialization • Absolute Advantage: A Detour • Ability to produce a good or service using fewer resources than other producers use • Comparative Advantage • If one can produce some good with a smaller opportunity cost than others can • Total production of every good or service will be greatest when individuals specialize according to their comparative advantage • Another reason why specialization and exchange lead to higher living standards than self-sufficiency

43. Resource Allocation • Problem of resource allocation • Which goods and services should be produced with society’s resources? • Where on the PPF should economy operate? • How should they be produced? • No capital at all • Small amount of capital • More capital • Who should get them? • How do we distribute these products among the different groups and individuals in our society?

44. The Three Methods of Resources Allocation • Traditional Economy • Resources are allocated according to long-lived practices from the past • Command Economy (Centrally-Planned) • Resources are allocated according to explicit instructions from a central authority • Market Economy • Resources are allocated through individual decision making

45. The Nature of Markets • A market is a group of buyers and sellers with the potential to trade with each other • Global markets • Buyers and sellers spread across the globe • Local markets • Buyers and sellers within a narrowly defined area

46. The Importance of Prices • A price is the amount of money that must be paid to a seller to obtain a good or service • When people pay for resources allocated by the market • They must consider opportunity cost to society of their individual actions • Markets can create a sensible allocation of resources

47. Resource Allocation in the United States • Numerous cases of resource allocation outside the market • Such as families • Various levels of government collect about one-third of our incomes as taxes • Enables government to allocate resources by command • Government uses regulations of various types to impose constraints on our individual choice • The market is the dominant method of resource allocation in United States • However, it is not a pure market

48. Resource Ownership • Communism • Most resources are owned in common • Socialism • Most resources are owned by state • Capitalism • Most resources are owned privately

49. Types of Economic Systems • An economic system is composed of two features • Mechanism for allocating resources • Market • Command • Mode of resource ownership • Private • State

50. Resource Allocation Market Command Centrally Planned Capitalism Market Capitalism Private Resource Ownership Centrally Planned Socialism Market Socialism State Figure 4: Types of Economic Systems