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ECON 2000 Lecture Notes - Disposable And Discretionary Income, Consumption Function

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chocolatewolf465
18 Mar 2014
School
York University
Department
Economics
Course
ECON 2000
Professor
Mokhles Hossain

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Document Summary

Suppose the initial value of the variable y is 10. Change in y = (20 10) = 10. Y = x + z, where y, x, z are all variables. Y = x - z, where y, x, z are all variables. If y = a + bx, where a and b are constants and y and x are variables. A = 0, if a is a constant and remains as a constant. Part of the disposable income is used to finance consumption expenditure and the rest is saved. Disposable income = consumption + households savings, (y-t) = c + prs, where, prs = households savings = private sector"s savings. + s = 1, where b = mpc, s = mps. Therefore b = 1-s, or s = 1-b. We assume that b is a constant and it is greater than zero but less than 1. C = c(y t), be careful with the right hand side.

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Related Questions

Suppose the basic consumption level of Primaland is $10,000 million and that people save only 10% of their income. Government spending there is $5,000 million and the budget deficit is balanced while exports are $700 but Trade is balanced as well. The investment level is $6000 million; however, investment is independent of income and interest rate.

Aggregate Demand Z is defined as Z = C+I+G+(X-M) and the equilibrium condition is Y=Z.

The disposable income is YD=(Y-T).

Consumption is C=C0+c1YD and Investment is: I=I0.

a. Set up the model for this economy.

b. Calculate and graph the equilibrium level of income for this economy.

c. What is the multiplier of this Economy?

d. What is the level of consumption at equilibrium?

e. What is the saving level if S= -C0+0.1YD? What is it equal to?

Consumer confidence drops and people decide to "save" more or "consume" less by lowering their basic consumption to $8,000

f. What happens to the equilibrium Y = income and what happens to save, EXPLAIN.

Question 1

Which of the following describes the relationship between the change in inventories and aggregate expenditure?

A.

Aggregate expenditure equals the change in inventories minus GDP.
B.

The change in inventories equals GDP divided by aggregate expenditures.
C.

Aggregate expenditures equals GDP divided by the change in inventories.
D.

Aggregate expenditures equals GDP minus the change in inventories.
E.

The change in inventories equals GDP multiplied by aggregate expenditure.

1 points

Question 2

Suppose the marginal propensity to consume is 0.80 and taxes decrease by $10 billion. Which of the following is true?

A.

Disposable income and consumption fall by $10 billion
B.

Disposable income and consumption rise by $10 billion
C.

Disposable income rises by $10 billion and consumption rises by $8 billion
D.

Disposable income falls by $10 billion and consumption falls by $8 billion
E.

Disposable income rises by $10 billion and consumption falls by $8 billion

1 points

Question 3

If aggregate expenditure at a particular level of income is less than output,

A.

output will increase
B.

output will decrease
C.

output will remain the same
D.

output will rise slightly and then level off
E.

we cannot determine what will happen to output

1 points

Question 4

The consumption function

A.

illustrates the relationship between real disposable income and real consumption spending
B.

illustrates the relationship between the price level and real consumption spending
C.

is the relationship between productivity and real consumption spending
D.

shows how real consumption increases when real disposable income decreases
E.

illustrates the relationship between real consumption spending and employment

1 points

Question 5

The focus of the short-run macro model is on the role of

A.

spending in explaining economic fluctuations
B.

labor in explaining economic fluctuations
C.

financial markets in explaining economic fluctuations
D.

output in explaining economic fluctuations
E.

resources in explaining economic fluctuations.

1 points

Question 6

If the output level is such that the aggregate expenditure line lies below the 45-degree line, which of the following is true?

A.

Aggregate expenditure is greater than output, so inventories will increase and output will be raised.
B.

Aggregate expenditure is greater than output, so inventories will decrease and output will be increased.
C.

Aggregate expenditure is less than output, so inventories will decrease and output will be raised.
D.

Aggregate expenditure is less than output, so inventories will increase and output will be lowered.
E.

Aggregate expenditure is greater than output, so inventories will increase and output will be lowered.

1 points

Question 7

If the marginal propensity to consume is 0.7, the expenditure multiplier is

A.

7.0
B.

0.7
C.

3.0
D.

3.3
E.

not determinable without additional information.

1 points

Question 8

Aggregate expenditure is the sum of

A.

all types of spending by households and firms
B.

spending and savings by households
C.

spending by households and governments on final goods and services
D.

spending by households, government, firms, and foreigners on final goods and services
E.

all spending and saving by households, firms, and governments

1 points

Question 9

If the marginal propensity to consume is 0.5 and disposable income increases by $10,000, by how much will consumption spending increase?

A.

$10,000
B.

$500
C.

$50
D.

$5,000
E.

$9,524

1 points

Question 10

When real consumption expenditure is plotted against real disposable income the resulting relationship is

A.

very weak.
B.

virtually flat .
C.

positive and very close to linear.
D.

negative and very close to linear.

PROBLEM 1 (This one is designed to give you lots of math practice!)

Consider the following individual utility functions:

Adam Smith: U(x,y) = xy

Jeremy Bentham: U(x,y) = xayb (Cobb-Douglas utility function)

Alfred Marshall: U(x,y) = ln x + ln y

John M. Keynes: U(x,y) = x + yb (Quasi-linear utility function)

Joan Robinson: U(x,y) = aX + bY (linear; perfect substitutes)

a. Solve for the MRS(XY) for each of the gentlemen (i.e., all but Joan Robinson). Show that Mr. Smith, Mr. Bentham, and Mr. Marshall all have diminishing MRS(XY), but that if a=b=2, their preferences exhibit constant, increasing, and decreasing marginal utility respectively. (Fortunately, diminishing MRS is the condition that guarantees convex indifference curves, so we can solve for their optimal consumption!)

 

b. What is the general formula for Mrs. Robinsons (constant) MRS?

c. Find demand functions for x and y for Smith, Bentham, Marshall, and Keynes. Assume that each man has income I and that the prices of x and y are px and py respectively.

d. Now assume that a=1/2, b = 1/4, I = 600, px = 10 and py = 20. Use these values to find the utility-maximizing quantities of x and y consumed by each man.

e. Find an expression for the share of income Mr. Bentham and Mr. Marshall each devote to the consumption of good x, where this share, sx, is defined as

(px x)/I.

f. Find expressions for the income elasticity of demand for good x for Mr. Bentham and Mr. Marshall. Find expressions for the (own) price elasticity of demand for good y for these two men.