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ECON 2030 Lecture Notes - Lecture 14: Loanable Funds, Autarky, Mutual Fund

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School
Auburn University
Department
Economics
Course
ECON 2030
Professor
Rachel Bailey

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Document Summary

Econ-2030 lecture 14- chapter 26: saving, investment, and the financial system (continued) Assume closed economy: nx = 0 (no trade with any other countries, imports or exports) Y = c + i + g, so i = y - c - g. Total income in the economy that remains after paying for consumption and government purchases. By definition, s = y - c - g. It follows: savings = investment for a closed economy. S = y - c - g can be rewritten as s = . Private saving, y - t - c. Total income that remains after paying for taxes & consumption for households. Tax revenue that the government has left after paying for its spending. National saving = private saving + public saving. Budget surplus: t - g > 0. Excess of tax revenue over government spending = t - g = public savings. Budget deficit: t - g < 0.

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Related Questions

In a closed economy, private saving is
 
A. The amount of income that households have left after paying for their taxes and consumption.
B. The amount of income that businesses have left after paying for the factors of production.
C. The amount of tax revenue that the government has left after paying for its spending.
D. Always equal to investment.

5. Saving and net flows of capital and goods In a closed economy, saving and investment must be equal, but this is not the case in an open economy. In the following problem, you will explore how saving and investment are connected to the international flow of capital and goods in an economy. Before delving into the relationship between these various components of an economy, you will be asked to recall some relationships between aggregate variables that will be useful in your analysis. Recall the components that make up GDP. National income (Y) equals total expenditure on the economy's output of goods and services. Thus, where C = consumption, I = investment, G = government purchases, X = exports, M = imports, and NX = net exports: Y = Also, national saving is the income of the nation that is left after paying for . Therefore, national saving (S) is defined as: S = Rearranging the previous equation and solving for Y yields Y = . Plugging this into the original equation showing the various components of GDP results in the following relationship: S = This is equivalent to S = , since net exports must equal net capital outflow (NCO, also known as net foreign investment). Now suppose that a country is experiencing balanced trade. Determine the relationships between the entries in the following table, and enter these relationships using the following symbols: > (greater than), < (less than), or = (equal to). Outcomes of Balanced Trade Imports Exports 0 Net Exports Y C+I+G Investment Saving Net Capital Outflow 0

Assume the following values of an economy.

Planned Investment (Ip) = $20

Autonomous Consumption (C ) = $30

Marginal Propensity to consume (MPC) = .9

What is the equilibrium income?

Y* = aggregate demand at the equilibrium level. (Consumption + investment)

Consumption function = autonomous consumption + mpc * Y.

C=30 + .9Y

AD = 30 + .9Y + 20 = 50 + .9Y

Y= 50 + .9Y.1Y = 50

Y = $500 is the equilibrium level of income.

What is the value of saving at equilibrium?

Savings = income - consumption at the equilibrium level of Y=500,

Consumption = 30 +.9 * 500 = $480

Savings = 500 - 480= 20

c. Does the saving and Investment Identity hold true at equilibrium income OR GDP?

Since planned investment = $20 which is equal to savings calculated, the saving investment identity holds true at equilibrium income.

2. In addition to the values given in question (1) above, assume the government increases its spending by $30 without raising taxes. The government can do this by borrowing from the private sector.

a. Based on this information calculate the new level of equilibrium income.

If Government expenditures = $30, Y = C + I + G

Y = 1/1-.09 * (30+20+30) Y = 800

b. Calculate the total value of consumption at equilibrium.

C = 30 + .9(800) = 750

c. Calculate the total value of saving at equilibrium.

Savings = I - C = 800 - 750 = 50

3. In addition to questions in (1 & 2) above, assume the government decides to raise autonomous taxes by $30 to balance its budget.

What is the new value of equilibrium income?

Y = 1/1-.9 (30-.9(30) +20+30) = 530

What is the value of the autonomous tax multiplier?

-.09/.01 = -9

c. What is the value of autonomous spending multiplier?

1/.1 = 10