Recent Question/Assignment

10 multiple choice questions
1 from section b
1 from section c
EC1002 ZA
Introduction to Economics
Thursday 2 May 2019: 14:30 – 17:30
Time allowed: 3 hours
This paper consists of THREE sections:
Section A (40 marks): TEN multiple choice questions, each worth FOUR marks. Candidates must answer ALL questions. No explanation is needed.
Section B (30 marks): Candidates must answer ONE of TWO questions on microeconomics. It is essential that candidates explain their answers.
Section C (30 marks): Candidates must answer ONE of TWO questions on macroeconomics. It is essential that candidates explain their answers.
Graph paper is provided at the end of this question paper. If used, it must be detached and fastened securely inside the answer book.
© University of London 2019
SECTION A: Multiple Choice Questions
Please mark the correct answer in the special multiple choice answer sheet provided using an HB pencil.
Candidates should write their candidate number in the boxes and then mark up their appropriate letter and numbers in the grid.
The date, candidate first name(s) and surnames should be written in the appropriate space.
Candidates should use an eraser to remove any unwanted marks as fully as possible.
If an eraser is unavailable, please put a cross (X) through the incorrect mark.
The sheets should not be folded or creased in any way as this will make them unreadable.
Candidates should not write anywhere else on the sheet other than to mark their answers as shown on the sheet; any writing or marks in an inappropriate place could make the sheet unreadable.

Candidates should answer ALL questions from this section.
Choose one answer for each question: no explanation is needed.
Note that some questions ask you to choose which statement IS correct and other questions ask you to choose which statement IS NOT correct.
1. Consider a market where the demand is given by ???? =120- ?? and supply is given by ???? =1 ??. What are the consumer and producer surplus?

a) Consumer surplus is 120 and producer surplus is 600.
b) Consumer surplus is 600 and producer surplus is 1200.
c) Consumer surplus is 240 and producer surplus is 300.
d) Consumer surplus is 1200 and producer surplus is 240.
2. Assume that movie tickets and popcorn are complements. Which of the following statements IS correct?
a) If the price of movie tickets goes down the quantity of popcorn demanded will decrease.
b) If the price of movie tickets goes down the quantity of popcorn demanded will not change.
c) If the price of movie tickets goes up the quantity of popcorn demanded will decrease.
d) If the price of movie tickets goes up the quantity of popcorn demanded will not change.
3. Which of the following statements IS NOT correct?
a) A tax does not always lead to the inefficient output.
b) Monopolies do not always create a deadweight loss.
c) If two firms compete in prices (Bertrand competition) they will set a higher price than if they compete in quantities (Cournot competition).
d) A monopolist chooses the price based on the elasticity of demand with respect to price (PED).
4. A farm is located next to a steel mill. The cows are free to go into the field but are hurt by the pollution created by the steel mill, which creates a negative externality. The profit function for the farmer is ???? =4??-??2-2?? where C is the number of cows the farmer has and S is the amount of mills the steel mill has. The profit function for the steel mill is ???? =6??-??2. The two firms merge to internalise the externality. What are the outputs they end up producing as one merged firm?
a) C=2 and S=3.
b) C=4 and S=2.
c) C=2 and S=2.
d) C=4 and S=3.
5. Choose the correct statement. The labour supply curve IS:
a) Always downward sloping.
b) Always upward sloping.
c) Upward sloping for monopsonies.
d) Perfectly elastic.
6. Choose the correct statement. Potential output IS:
a) The output demanded by households as consumption and by firms as investment.
b) The output obtained when there is no unemployment.
c) The output obtained by trading with other countries.
d) The output obtained when all inputs are fully employed.
7. Although investors in a given economy take into consideration the nominal interest rates when they make investment decisions, in the IS-LM model we express the level of investment (and so the IS curve) as depending on the real interest rate. Why is this the case?
a) Because the nominal interest rates are less volatile than the real ones.
b) Because nominal interest rates are determined by the Central Bank.
c) Because prices are fixed in the short-run and so the nominal interest rate is the same as the real one.
d) Because we focus on policy tools that affect the real (non-monetary) side of the economy.
8. In a time of political instability investments fall because of lack of confidence from consumers. With no change in fiscal policy and no change in the interest rate the IS-LM model still predicts some adjustments. Assume that this is a closed economy. Which of the following statements IS NOT correct?
a) Investments will be lower for any given interest rate.
b) Income will fall because of a rightward shift in the IS curve.
c) The new interest rate will be lower.
d) The LM curve will not shift.
9. Which of the following statements IS correct?
a) The real exchange rate cannot be equal to the nominal exchange rate.
b) The real exchange rate depends only on the rates of inflation in the two countries.
c) The purchasing power parity exchange rate is the path of the nominal exchange rate that maintains a constant real exchange rate.
d) The purchasing power parity exchange rate can be computed by looking at the market for one good.
10. What does the convergence theory in the Solow model imply?
a) Rich nations will stop growing.
b) Poor nations will grow slower than rich nations.
c) Growth will only arise if a nation is not in steady state.
d) Poor countries will grow faster than rich countries.
SECTION B: Microeconomics
Candidates should answer ONE of the following long questions. It is essential that you explain your answers.
a) What is the difference between a normal and an inferior good? Is leisure a normal good? What about hours worked (i.e. labour)? (4 marks)
b) Why is the slope of the demand for inferior good steeper than for a normal good? What happens to a normal and an inferior good when the price goes up? Show this graphically and explain. (6 marks)
c) What is the effect of a wage rise on consumption and labour supplied? Show this on an indifference curve graph and explain. (8 marks)
d) How does labour mobility affect the slope of the industrys labour supply curve? List at least one type of labour mobility. (6 marks)
e) Does a minimum wage always create unemployment? Explain. (6 marks)
a) Define a dominant strategy and Nash equilibrium. Can two firms interacting with each other have no Nash equilibria if both have a dominant strategy?
(4 marks)
b) Consider two phone producers: Orange and Star. They have two possible strategies, improving cameras (IC) or improving battery life (BL). The profits that each firm makes from those strategies are reported in the following table:
Players Star
Orange IC BL
IC -200,-200 200,300
BL 300,200 -100,-100
Is there a dominant strategy for any of the firms? Find all the Nash equilibria in the game. (6 marks)
c) Now consider a market with the same two firms, Orange and Star, competing in quantity to maximise their individual profits. The market demand is P=2009(Q1+Q2), where Q1 is the quantity produced by Orange and Q2 is the quantity produced by Star. The total cost for Orange (firm 1) is TC1=92Q1, while the total cost for firm 2 is TC2=92Q2. What are the firms reaction functions? What are the Cournot-Nash outputs, price and profits? (12 marks)
d) Orange and Star now decide to merge as they realise that profits will be higher if they do. What will be the output, price and profit if they do?
(8 marks) SECTION C: Macroeconomics
Candidates should answer ONE of the two following long questions. It is essential that you explain your answers.
a) There is some consensus that following Brexit house prices will drop in London. If prices do fall, how are banks balance sheets affected? Why? How do you expect this to affect the ability of banks to borrow from each other, depositors and financial markets? (8 marks)
b) Does the fall in house prices affect only house owners and banks? Discuss the impact of the price decrease on the economy. (6 marks)
c) Now assume that the Central Bank would like to foster investments by lowering interest rates. What happens if interest rates are already very low? Will the policy be effective? (6 marks)
d) Some analysts suggest that there might be a bubble in the financial market. They suggest using a policy mix to reduce the impact of the bubble. Explain why this might work and show the appropriate shifts in the IS-LM model. Does the effectiveness of the policy mix depend on the exchange rate regime?
(10 marks)
a) What does the Phillips curve represent? Is there a difference between the
Phillips curve in the short-run and long-run? Explain and show it in a diagram.
(6 marks)
b) What is the impact of a short-term negative shock on output, unemployment and inflation? Explain and draw a diagram. (6 marks)
c) What is the relationship between the current and capital accounts in a flexible exchange rate regime? (4 marks)
d) What is Okuns law? (4 marks)
e) Assume that we are in a floating exchange rate regime. The price of oil went up, driving the economy to a much higher unemployment rate. Use a standard IS-LM-BP model to explain what happens to income, interest rates and the balance of payment if the central bank uses monetary policy to stabilise the economy at potential output. (10 marks)

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