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Posted at 01:14 PM in Problem Sets | Permalink | Comments (0)
A spreadsheet for playing with the medium-run flexible-price model set out at http://delong.typepad.com/delongslides/2008/02/the-flexible-pr.html is now up on the internet at: http://www.j-bradford-delong.net/2008_xls/20080227_flexmodel.xls
Parameters go in g44:g57; outcomes are in g60:g70 and in the graph to the left of parameters and outcomes...
Your assignment is to:
Test the spreadsheet. Download the .xls file, open it in Excel (or equivalent), change one parameter value, and report if what the model says happened makes sense--is the spreadsheet correct?
Analyze the results: explain why--that is, provide some intuition--the spreadsheet reported that your change in the mode parameters had the effects that it did.
Email your results to me at brad.delong@gmail.com.
Posted at 08:44 AM in Other Assignments | Permalink | Comments (0)
American Post-WWII Inflation, 1951-1994
What determines V (and v)?
P = MV(r+π)/Y
π = µ - g - n + v
Comparative statics:
A Change in the Rate of Money Growth...
Posted at 06:16 AM in Lecture Notes | Permalink | Comments (0)
Last time we had our circular flow of economic activity...
We took that and looked at the "flow of funds" through financial markets piece...
And that gave us our clue as to what happens in the economy in order to guide the flow of demand/production into its C, I, G, NX channels...
Supply and demand in the flow of funds through financial markets pushes the interest rate up and down, and so keeps the economy in equilibrium--with the equilibrium level of investment changing in reponse to changes in government policy and in economic conditions...
Take a look, first, at the closed-economy case...
The open-economy case is more complicated: r -> e -> X as well as r -> I...
Example: an increase in the propensity to import accompanied by a cut in taxes...
In the real world things are more complicated still: J-curve
Posted at 08:59 AM in Lecture Notes | Permalink | Comments (0)
Go to http://briefing.com/Investor/Public/OurView/OurViewLanding.htm at briefing.com and read the following two articles:
Then write a comment on this webpage giving your view about how the factors and concerns enunciated by briefing.com head Richard Green do or do not match up to the factors and concerns taught, so far, in this course. Participate in the ongoing conversation already started in the comments posted before yours.
Posted at 08:42 AM in Other Assignments | Permalink | Comments (52)
Posted at 11:42 AM in Lecture Notes | Permalink | Comments (0)
Mean = 61.6
Median = 63
Standard Deviation = 13.5
Min, Max = 22, 88
25th - 75th percentile range = 54 - 70
Posted at 10:33 AM | Permalink | Comments (0)
Posted at 07:38 AM in Lecture Notes | Permalink | Comments (0)
ECON 101B: FULL-EMPLOYMENT MODEL PROBLEM SET
http://www.j-bradford-delong.net/2008_pdf/20080220_FEMPS.pdf
Suppose that in the flexible-price full-employment business-cycle model the government increases taxes and government purchases by equal amounts. The tax increase reduces consumption spending. What happens qualitatively (tell the direction of change only) to investment, net exports, the exchange rate, the real interest rate, and potential output?
Explain, qualitatively only, the direction in which consumption, investment, government purchases, net exports, the exchange rate, the real interest rate, and potential output move in the flexible-price full-employment business-cycle model if the government raises taxes.
Give three examples of changes in economic policy or in the economic environment that would increase investment in the full-employment flexible-price business cycle model.
Give three examples of changes in the economic environment or in economic policy that would decrease the value of the domestic currency in the full-employment flexible price business-cycle model.
Economists say that a government can raise real revenue--real power to buy goods and services--through the "inflation tax." Who is it that pays this inflation tax? How is it that the government collects it?
Suppose that real GDP is $12,000 billion, the velocity of money is 6, and the money stock is $2,500 billion. What is the price level?
Suppose that the rate of labor force growth is 3% per year but the efficiency of labor is stable, and the economy is on its steady state growth path. Suppose also that the rate of growth of the nominal money stock is 10% per year. Do you think that it is likely that the inflation rate is less than 5% per year? Why or why not?
What would the Federal Reserve have to do if it wanted to raise the monetary base today by $10 billion? What do you guess would happen to the price of short-term government bonds if the Federal Reserve did this?
Suppose that in the flexible-price full-employment model the government increases taxes and government purchases by equal amounts. The tax increase reduces consumption spending. What happens qualitatively (tell the direction of change only) to investment, net exports, the exchange rate, the real interest rate, and potential output?
What happens according to the flexible-price full-employment model if the intercept C0 of the consumption function rises? Explain qualitatively (tell the direction of change only) what happens to consumption, investment, net exports, the exchange rate, the real interest rate, and potential output.
Suppose that the relevant parameters of the economy are: (a) t =0.33 Tax rate of one-third. (b) Ir =90 A 1-percentage-point fall in the interest rate raises investment spending by $90 billion a year. (c) Cy =0.75 A marginal propensity to consume of three-quarters. (d) εr =10 With an initial value for the real exchange rate ε set at the traditional indexed value of 100, a 1-percentage-point change in the interest rate difference vis-à-vis abroad generates a 10 percent shift in the exchange rate. (e) Xε =6 A 10 percent change in the exchange rate leads to a $60 billion–a-year change in exports. And suppose that an irrational exuberance causes a stock market boom that leads consumers to increase their spending by $200 billion at a constant level of disposable income. What would be the increase in interest rates in response to such an exuberance- driven consumption boom?
In the economy presented in question 10, suppose that total GDP is $10 trillion and that the government does not want real interest rates to rise and investment to fall in response to the stock market–generated consumption boom. What kinds of policies can the government undertake? How successful will they be?
When President George W. Bush took office, he spent essentially all his political capital on his first-year effort to cut taxes and raise spending by $500 billion a year in an economy with an annual GDP of $10 trillion. What, qualitatively and quantitatively, does the flexible-price full-employment model say should have been the consequences of these policies if the relevant parameters of the economy are those given in question 10?
Posted at 07:05 AM in Problem Sets | Permalink | Comments (0)
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