1. Microeconomics Level 1

2. 0930Course objectives 0940Introduction to economics 1040 COFFEE 1100What markets do: supply, demand, and equilibrium 1145 Group work 1215 Review of group work 1300 LUNCH 1400Market failure, and government intervention 1445Group work and TEA 1510 Review of group work 1530Cost benefit analysis 1600Lessons from Level 1 1610 Test 1645End

3. COURSE OBJECTIVES This course has three objectives to provide an overview of the scope and methods of economics to offer a self-contained introduction to key themes in microeconomics to equip participants to proceed to Level 2

4. COURSE OBJECTIVES Economic analysis aims to be rigorous, but it need not be technical. No prior knowledge of economics or mathematics is assumed.

5. CONCEPTS & TOOLS

6. Basic Concepts Stocks and Flows Goods and services Share of National Output, percentage AgricultureIndustryServices UK196534651 199723068 France 196583953 199722771

7. Basic Concepts What, how and for whom Markets versus ‘command economy’

8. Basic Concepts MICROECONOMICS: detailed study of decisions made by consumers, producers and their interaction in specific markets MACROECONOMICS: big picture – emphasizes interactions in the economy as a whole.

9. Basic Concepts POSITIVE ECONOMICS tries to explain behaviour NORMATIVE ECONOMICS prescriptions based on value judgments

10. Basic Concepts: The Production Possibility Frontier Maximum quantity one good that can be produced, given quantities of other goods being produced A, B, C efficient (on the frontier) D, E inefficient (inside the frontier) F, G unattainable (outside the frontier)

11. Basic Concepts OPPORTUNITY COST OF A GOOD What we could have had instead

12. Basic Concepts COMMAND ECONOMY central planner issues orders FREE MARKET ECONOMY what, how & for whom decided by prices, incomes, wealth DEGREES OF GOVERNMENT INTERVENTION Hong Kong- China - Denmark - UK - USA -Cuba

13. Scale of government (spending as % of national income) 1880193019601990 Japan11191832 USA8102836 UK10243241 Germany10313245 France15193552 Sweden683150

14. TOOLS MODEL Deliberate simplification of reality like a map DATA Time Series Cross-section

15. TOOLS NOMINAL & REAL VARIABLES 197019821991 Unit labour costs 100406589 Real unit labour costs = (Unit labour costs / Retail prices) x 100 Real unit labour costs 1009382 Retail prices 100438720

16. Tools: Visualizing data A scatter diagram

17. Tools: Interpreting the data + + + ++ + + + + Bus fare Bus Revenue It appears that higher bus fares cause higher revenue…

18. Tools: Interpreting the data + + + ++ + + + + Bus fare Bus Revenue … but it might not be true Low tube fare High tube fare Suppose the two clusters are from two different time periods – what might that imply?

19. Tools: Interpreting the data Bus revenue depends on bus fares But it also depends on other things incomes price of other modes of travel reliability (relative to other modes of travel) relative comfort relative perception of safety

20. DEMAND, SUPPLY & PRICE ADJUSTMENT

21. Market DEMAND quantity buyers wish to buy at each price SUPPLY quantity producers wish to sell at each price MARKET arrangement to exchange goods & services EQUILIBRIUM PRICE the price at which market clears (i.e. quantity demanded = quantity supplied)

22. Market Demand curve quantity price Equilibrium Quantity Equilibrium Price PRICE ADJUSTMENT Equilibrium price clears market Supply curve

23. Market The demand curve shows the relation between price of a good and quantity demanded of that good. But how does demand change when ‘other things’ change?

24. DEMAND IN MORE DETAIL elaborating on the ‘other things’ How does DEMAND for a good vary when 1 price of a related good changes? – substitutes – complements 2 consumer’s income changes? –normal goods –inferior goods 3 tastes change? – role of fashions and fads, culture

25. COMPARATIVE STATICS (effect of changing the ‘other things’) Suppose income rises, increasing demand

26. SUPPLY IN MORE DETAIL elaborating the ‘other things’ How does SUPPLY of a good vary when 1technology improves? 2input prices change? energy, labour, capital 3regulation imposes extra costs?

27. COMPARATIVE STATICS Suppose technical breakthrough raises supply

28. COMPARATIVE STATICS An important difference If demand shifts, equilibrium price and quantity move in the SAME DIRECTION If supply shifts, equilibrium price and quantity move in OPPOSITE DIRECTIONS

29. SOME EXAMPLES Third world farming What is the effect of better irrigation & fertilizer? What happens to price? To quantity? To revenue? Computers The price of a personal computer has been falling. Which is shifting, demand or supply?

31. Introduction to Economics GROUPWORK 1Are the following statements positive or normative? (a) Higher tax rates cut revenue from tobacco taxes (b)Poor countries got an unfair share of world income (c) Smoking is antisocial & should be discouraged (d)Airbus needs public support (e)Airbus deserves public support (f )Airbus is a good investment for Britain

32. GROUPWORK 2The price of crude oil increased from $2.90 to $9 per barrel in 1973, in a coordinated move by OPEC members. (a)How did the OPEC members manage to raise the price? Show using a supply-demand diagram for the oil market. (b)What happened to the demand for coal and the price of coal? Show using a supply-demand diagram for the coal market. (c)What happened to the demand for fuel-guzzling cars? (d) What happened to supply and demand for oil eventually?

34. GROUPWORK 3The following data describe price and output of a product: (a)Plot a scatter diagram (b)“Higher prices make firms raise output.” “People buy less when prices are higher” Does the diagram shed any light on these statements? Could both be correct? Explain. YearPriceOutput 1985100101 1986104107 1987108112 1988112122 1989118128 1990117128 1991108118 199298103

35. GROUPWORK 4For each government intervention listed below, identify the possible rationale. (a) Income tax (b) Taxation of petrol (c) Regulating gas prices (d) Banning the use of cannabis (e) Running the NHS (f ) Maintaining an army

37. Why Intervene?

38. The Role of Government IF MARKETS ARE EFFICIENT (i.e. ‘invisible hand’ works), the government could confine attention to –Legislation and general regulation –Redistribution (taxation & transfer payments) –Macroeconomic management (stabilization)

39. The Role of Government However, sometimes free markets are not efficient MARKET FAILURES These instances are called MARKET FAILURES When markets fail, the government may intervene for efficiency reasons

40. SOURCES OF MARKET FAILURE 1. EXTERNALITIES One person's decisions/choices affect others DIRECTLY If markets were free and unregulated cannot be made to PAY for the HARM you inflict on others (e.g. pollution) cannot RECOVER all the value of BENEFITS you confer upon others (use of green technology)

41. SOURCES OF MARKET FAILURE 1. EXTERNALITIES Individual’s optimal decision is not optimal for society Result: OVERPRODUCE the bad things, UNDERPRODUCE the good things. Market outcome is INEFFICIENT, Government intervenes to CORRECT INEFFICIENCY Policy Tools: tax, subsidy, quota, artificial markets

42. SOURCES OF MARKET FAILURE 2.PUBLIC GOODS Goods that we consume together, so that no individual can be excluded from consuming consumption by one does not leave less for others National defence Street lighting No one has any incentive to pay for such goods. In the absence of government intervention, too little of these will be provided. Government steps in to ensure right level is produced.

43. SOURCES OF MARKET FAILURE 3. IMPERFECT COMPETITION If firms have market power (power to set prices above cost), markets are usually INEFFICIENT Once again, government can intervene (say, by regulating prices) Example: Regulation of National Grid

44. GOVERNMENT FAILURE In PRINCIPLE, the government can correct market failures In PRACTICE, the government does not always improve matters sometimes makes things worse Why?

45. GOVERNMENT FAILURE INFORMATIONAL PROBLEMS INCENTIVE PROBLEMS RENT SEEKING & CAPTURE Hence, must check for the possibility of GOVERNMENT FAILURE before jumping to conclusions.

47. MARKET FAILURE & GOVERNMENT FAILURE GROUPWORK 1 There is a tax on cars in Central London (a)Why not leave things to the market? List the different motives for intervention. (b) Which of these are to do with efficiency? (c)Are there any other motives than efficiency? (d)Is/Was there a possibility of government failure?

48. MARKET FAILURE & GOVERNMENT FAILURE GROUPWORK 2If people want to watch advert-free terrestrial TV, there should be a market for this. So what is the case for the compulsory TV License?

50. COST-BENEFIT ANALYSIS Usually applied to government investment decisions –roads –channel tunnel – subsidies to start-ups, R&D The main question: How do we value SOCIAL costs and benefits of a project?

51. COST-BENEFIT ANALYSIS STEPS IN THE PROCEDURE check how the private sector would do it adjust for discrepancies between private profitsprivate profits PLUS spillover benefits to others private costs private costs PLUS spillover costs borne by others Private valuationsSocial Valuations

52. COST-BENEFIT ANALYSIS EXAMPLE: THE JUBILEE LINE EXTENSION PRIVATE VALUATIONS CostsCostspresent value of construction cost (say, takes 4 years to build) +present value of future operating costs (maintenance, wages, electricity) BenefitsBenefits present value of passenger fares Build if Net Present Value of project is positive (i.e. project is profitable).

53. COST-BENEFIT ANALYSIS EXAMPLE: THE JUBILEE LINE EXTENSION SOCIAL COST BENEFIT ANALYSIS Were any social benefits or costs missed in the above valuation? Beneficial externalities less congestion on roads less pollution helps integrate London Harmful externalities vibration to houses above line congestion near terminuses Social cost benefit analysis should attempt to measure as many of these implications as possible. Externalities

55. economic models are deliberate simplifications of reality ‘other things equal’ streamlines thought but its validity needs checking supply and demand explain equilibrium price and quantity markets sometimes fail to be efficient governments could intervene to correct failure but government action is itself vulnerable to failures of course, governments also care about equity social cost benefit analysis tries to measure as many inputs and outputs of a project as possible

56. MICROECONOMICS LEVEL 1