Saturday, April 11, 2015

2012 Macroeconomics Exam FRQ #2

2012 Macroeconomics Exam FRQ #2


Watch me answer it on youtube https://youtu.be/WPH4Pmot8aM


(a) What is the reserve requirement?

If demand deposits are $100,000 and required reserves are $10,000 we can assume that the reserve requirements are 10%.

Answer - One point is earned for calculating the correct reserve requirement of 10 percent
($10,000/$100,000). 

(b) Assume that Luis withdraws $5,000in cash from his checking account at Mi Tierra Bank.

(i) By how much will Mi Tierra Bank's reserves change based on Luis's withdrawal.

So, Luis deposited $100,000 into the bank, of which 10% is required by the Fed to be held as required reserves. The banks has loaned out $85,000 dollars of the amount Luis deposited into the bank, leaving $5,000 in cash on hand,, called excess reserves.

If Luis takes out $5,000 then reserves will decrease by $5,000.

Answer - One point is earned for stating that total bank reserves will decrease by $5,000 

(ii) What is the initial effect of the withdrawal on the M1 measure of money supply? Explain.

First, you must know what the M1 money supply actually is.. 
Monetary Policy Cheat Sheet

M1 is paper money, coins and checkable deposits,,, no matter if the money is in the bank as checkable deposits or in Luis's pocket as cash it doesn't effect the M1 money supply. I guess if Luis took the money and burned it,, then the M1 level of the money supply would have been changed.
Short of burning the money,, the M1 doesn't change from bank  (checkable deposits) to customer (cash).
Answer - One point is earned for stating that the $5,000 withdrawal has no effect on the M1 measure of the money supply because it only changes the composition of M1 between cash and demand deposits. 

(iii) As a result of the withdrawal, what is the new value of the excess reserves on the balance sheet of the Mi Tierra Bank, based on the reserve requirements from part (a).

This is tricky,, you must decrease the Demand deposits by the $5,000 and decrease excess reserves by $5,000 and then add back to excess reserves the amount $500 that doesn't need to be held in reserved requirements due to the $5,000 withdrawal.



Answer - One point is earned for stating that the new value of the excess reserves is $500. 









2012 Macroeconomics Exam FRQ #1

2012 Macroeconomics Exam FRQ #1




watch me answer it here


Watch me anser it here


(a) Assume that Rankinland produces only food and clothing. Draw a correctly labeled PPC for Rankinland. Show a point that could represent the current output combination and label it A.

Remember, Rankinland is in Recession,, so all resources are not being utilized. Again,, recession usually means higher unemployment,, so the point A on the PPC represents, (or can represent) unemployment.


(b) Assume that the Central Bank of Rankinland pursues an expansionary policy.

(i) Identify the OMO, Open Market Operation that the central bank would use.

Expansionary fiscal policy,,, the OMO the central bank would use is the buying of bonds. When bonds are bought,, cash flows into the economy. The money supply is increased and nominal interest rates fall,, as interest rates fall, consumption (C) and investment (I) increase and therefore aggregate demand (AD) increases.

Answer - the central bank will buy bonds

(ii) Draw a CLG of the money market graph and show the short-run effects of the expansionary monetary policy on the nominal interest rate.
CLG - Correctly Labeled Graph,, nominal interest rate on the vertical axis,, and quantity of money on the horizontal.. MS for money supply shifting right (with arrows) and a decreasing of the nominal interest rate (with arrows) and a downward sloping demand for money curve.

(iii) Assume no change in the price level, what happens to the real interest rate, as a result of the expansionary policy,, Explain...

NO Change in the Price Level



Ok,, so first,, if you have learned the graphs like I have,, then when AD increases then the PL Price Level increases also. But that is because I was taught the classical/monetarist graph that has an upward sloping aggregate supply curve.
As AD increases the PL rises.
This no price level change can (theoretically) happen if the recession is bad and we use the Keynesian aggregate supply curve.
The Keynesian AS curve is viewed as horizontal during a recession and therefore that AD can increase with no Price Level changes
So,, we have expansionary monetary policy with no PL change and we need to know what happens to the real interest rate.

Let us look at the cheat sheet.Monetary Policy Cheat Sheet


If we understand that when the Fed buys bonds the Nominal Interest rate will fall and that with no price level change the nominal interest rate is the real interest rate then the Real interest rate must fall also.


Answer - One point is earned for explaining that with the price level remaining constant, when the nominal interest rate falls, the real interest rate also falls

(iv) Given your answer to part (b)(iii) regarding the real interest rate, what happens to the real gross domestic product (GDP) in the short-run? Explain.


As we can see,, the AD curve in the short run will increase and the R-GDP will also increase because an increase in the money supply will cause nominal interest rates to fall,, the lower rates will entice people to consume (C) and invest (I) which increases the AD therefore increasing (in the short-run) the R-GDP.

Why in the short-run???,,, because in the long-run we can be sure that prices will rise and rising prices will cause the demand for money to rise,, this will cause the Nominal interest rates to rise and that will decrease consumption (C) and Investment (I) and a decreasing of AD..


Answer - One point is earned for stating that the real GDP will increase in the short run and explaining that investment or consumption increases, causing aggregate demand to increase. 

(c) Suppose Rankinland has a current account deficit. Rankinland's currency is called the Bera.

(i) What will initially happen to the current account deficit in Rankinland solely due to the change in real GDP from part (b) (iv). Explain.

First, you must know that a current account deficit is a situation where imports > exports. If there is more money being pumped into the economy by the central bank,, we can assume that more imports will be consumed. So the deficit will increase.

Answer - One point is earned for explaining that the increase in real GDP increases income, which causes imports to increase and net exports to decrease.

(ii) What will happen to the international value of the Bera solely due to the change in the R-GDP from part (b) (iv). Explain.

If there is an increase in the money supply and more citizens spend money on imports,, then goods will come into the country and Bera's will go out. An increasing supply of Bera's in the international market will decrease their value.

FOREX Cheat Sheet


an increasing level of imports will increase the supply of Bera in the FOREX market which will lower the value of the Bera.

Answer - One point is earned for explaining that the decline in the international value of the bera is due to an increase in the supply of the bera



Tuesday, April 7, 2015

2013 AP Microeconomics Exam FRQ #3

2013 AP Microeconomics Exam FRQ #3

(a) Draw a CLG of the market for fireworks and show the market equilibrium price and quantity, labeled, Pe & Qe.
(b) Assume the noise from the fireworks disturbs all of the neighbours. On your graph in part (a), show each of the following.

(i)   The marginal social cost curve, labeled MSC
(ii)  The marginal social benefit curve, labeled, MSB
(iii) The dead weight loss, if any, shaded completely.


(c) Now assume instead, that all of your neighbours enjoy watching the fireworks.
(i)  In this case, is the market equilibrium quantity of fireworks greater than, less than, or equal to the socially optimal quantity?



As we can see, when the externality is drawn with the fireworks being enjoyed,, there still is an externality in that someone is benefitting from the fireworks,, and someone is not being compensated for providing that benefit.

Answer - the fireworks now generate a positive externality and the market equilibrium is less than the socially optimum quantity. There is still an externality and deadweight loss showing a benefit to a third party.

(ii) If the government bans fireworks will the deadweight loss, increase, decrease, or remains the same.

If people enjoy fireworks and the government bans them,, then society is moved farther from the socially optimal quantity. Remember, DWL is inefficiency meaning that some people are not getting served that should,, that is why with a positive externality the government usually wants to subsidise the cost so that more people will have the merit good.

So, this is what the deadweight looks like after a government ban.
Answer - deadweight loss has definitely increased.





2013 Microeconomics Exam FRQ #2

2013 Microeconomics Exam FRQ #2

Watch me answer it here

(a) What strategy should Piecrust choose if LaPizza chooses to advertise? Explain using the dollar values in the payoff matrix.


If LaPizza chooses to advertise PieCrust has two option,, to advertise or to not advertise.
Obviously $250 > $180 so PieCrust will choose to advertise also.

(b) What is the dominant strategy, if any for LaPizza? Explain using the dollar values in the payoff matrix.

If PieCrust advertises LaPizza has two choices, to either advertise or not advertise. LaPizza will do better to not advertise as $300 > $200.

If PieCrust does not advertise LaPizza has two choices to advertise or not to advertise. LaPizza  will do better to advertise as $500 > $400.

Answer - LaPIzza does not have a dominant strategy (a strategy it would do no matter what PieCrust would do) LaPizza's best strategy is to do the opposite of PieCrust.


(c) In the Nash Equilibrium, determine each of the following.
(i) PirCrust's daily profit.
(ii) LaPizza's daily profit.

A Nash Equilibrium exists when there is no unilateral profitable deviation from any of the players involved. In other words, no player in the game would take a different action as long as every other player remains the same. Nash Equilibria are self-enforcing; when players are at a Nash Equilibrium they have no desire to move because they will be worse off.

Answer - PieCrusts daily profit will be $450 and LaPizza's daily profit will be $300


(d) Suppose the advertising costs increase by $60 per day. Redraw the payoff Matrix to reflect the effects of the higher advertising costs.











2013 Microeconomics Exam FRQ #1

2013 Microeconomics Exam FRQ #1


Watch me answer it here



(a) Assume that the profit maximising monopolist is unregulated. Using the labelling in the graph, identify each of the following.

(i) the monopolist's quantity of output.

It is a profit maximising monopolist so profit maximising is where MR = MC.

Answer - the monopolist's quantity of output is at Q1.


(ii) The monopolists price.
Answer - The monopolists price is at P3.

(iii) The Profit earned by the monopolist.
Answer - Area of Profit, P1,P3,a,c

(iv) The deadweight loss.
Answer - Deadweight loss area (acf)

(b) Now assume that the monopolist can perfectly price discriminate. Using the labelling of the graph, identify each of the following.
(i) the quantity produced
(ii) the total revenue received by the monopolist.


Answer - P4,f,Q3,0   all in red is the total revenue.

(c) Instead, assume the monopolist charges a single price and is regulated to produce the socially efficient quantity. Using the labelling of the graph identify each of the following.
(i) The socially efficient quantity.
(ii) The consumer surplus at the socially efficient quantity.

The socially efficient quantity is allocative efficiency where P = MC or D = MC

Answer - the socially efficient quantity is at Q3 & the consumer surplus is P1,P4,f.

(d) Is the monopolist facing the regulation in part (c) earning positive economic profit, zero economic profit, or incurring a loss. Explain.

The regulated monopolist is making zero economic profit as he is covering his ATC's. 

Answer - the monopolist is making zero economic profit as the price equals the ATC.

(e) Is point f in the elastic, inelastic, or unit elastic section of the demand curve? Explain.


Answer - f is in the inelastic section of the curve as the MR (marginal revenue) is negative.


You must train daily.







Monday, April 6, 2015

2013 AP Macroeconomics FRQ #3

2013 AP Macroeconomics FRQ #3



watch me answer it here

3 Inflation and expected inflation are important determinants of economic activity.

(a) Draw a CLG of the short-run Phillips curve.

You should know how to do this without thinking,,, 
Phillips Curve, a tradeoff between inflation and employment
Unemployment & Inflation Cheat Sheet - 

Short-Run Phillips curve downward sloping with axis labeled appropriately.

(b) Using your graph is part (a), show the effect of an increase in the expected rate of inflation. 

Expected Inflation not actual inflation

(c) What is the effect on the increase in the expected inflation rate on the Long-Run Phillips curve.

The long-run phillips curve is effected by situations that will decrease or increase the NRU, Natural Rate of Unemployment,,, so if the government expand unemployment benefits the LRPC will shift right,, and if the government cuts unemployment benefits the LRPC will shift left. 

There is no trade-off between unemployment and inflation in the Long-Run.

Answer - an increase in the expected rate of inflation does not effect the LRPC.

(d) Given the expectation of the increase in inflation from part (b)

(i) will the nominal interest rates on new loans increase, decrease or remain unchanged?

If inflation is expected to increase then the Price Level is expected to increase then the demand for money is expected to increase.. If demand for money is expected to increase then interest rates for new loans will increase.

Answer - Nominal interest rates will increase.



(ii) Will the real interest rate on new loans, increase, decrease, or remain unchanged?
Ok, so if the nominal interest rate is rising with the expected level of inflation the bankers crafting new loans will be building into the loans the expected rise in inflation.

In essence,, I'm a banker and I'm selling loans at the nominal rate of interest of 5% and this is also the real rate with no inflation,,, but I expect the rate of inflation to increase by 2%,,, I'm going to sell all new loans at 7% rates of interest. I'm going to build into the loans the expected rate (2%) of inflation. Thus the real rate will not change it will still be 5%.

Nominal Rate = Real Rate (no inflation)
Real Rate = Nominal Rate - Inflation
Nominal Rate = Real Rate + inflation

Answer - The real interest rate will not change

(e) Assume that the nominal interest rate is 8%. Borrowers and lenders expect the rate of inflation to be 3% and the growth rate of the real GDP is 4%. Calculate the real interest rate.

Real Rate = Nominal Rate - Inflation
5% = 8% - 3%


Answer - the real interest rate is 5%