ECON 314 Lecture Notes - Lecture 13: Diminishing Returns

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24 Jun 2019

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But the total output (y) grows at rate n. Implications for savings: an increase of savings rate leads to higher steady state levels of k and y. Implications for population: high population growth rates lead to lower steady state level of k and y. It doesn"t provide a mechanism for growth over an extended period of time. Short run growth is attributed to technological progress = solow. It is difficult to analyze the determinants of technological advancement because it"s outside of the model. It fails to explain the large differences in the residual across similar countries. It seems to suggest that capital will move from more advanced countries to less developed countries (because returns would be higher) - but clearly this is not actually happening. The need to explain income differences across countries. The need to explain the significant economic growth observed. It relies on externalities from investment on capital as the source of growth - y = ak.

Related Questions

1. What does the term s*Y represent in the capital-accumulation equation of Solow growth model?

a) The labor-income share of GDP.

b) Net investment.

c) Gross investment.

d) The net change in the capital stock from one year to the other.

2. In the Solow growth model, suppose that the savings rate is 25%, the depreciation rate is 10%, the current capital stock is 10 trillion $ and current output of a country is 4 trillion $. What will the capital stock of this country be in the following period?

a) 10 trillion $.

b) 11 trillion $.

c) We cannot tell since we are not given information about technological progress.

d) We cannot tell since population growth is not known.

3. Consider a country which starts with a capital stock below its steady-state level in the Solow model (without technological change). Why is growth slowing down over time for this country?

a) Population growth is becoming stronger over time since the population is growing, which makes it harder to accumulate high levels of capital per capita.

b) A country cannot maintain the same savings rate forever, so investment must decrease at some point.

c) The more capital there is, the more of it depreciates. As the country becomes richer, it becomes ever harder to replace depreciated capital.

d) There are diminishing returns to the factor capital. Thus investment, capital and GDP per capita grow by ever smaller amounts as the country becomes richer.

4. Suppose Pakistan has a higher savings rate than Iran. Both start out with the same capital per worker. All other parameters are the same for both countries (population growth and depreciation rate). The Solow growth model (without technological change) predicts that...

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1. According to the Solow model, an increase in the capital-labor ratio will a. always increase steady state consumption per worker b. reduce steady state consumption per worker if the capital-labor ratio is below the Golden rule capital stock c. always reduce steady state consumption per worker d. increase steady state consumption per worker if the capital-labor ratio is below the Golden rule capital stock

2. In a steady state a. capital and labor, by definition, are inversely related to one another b. both consumption per worker and the capital-labor ratio are constant c. consumption per worker can change, but the capital-labor ratio is constant d. consumption per worker is constant, but the capital-labor ratio can change

3. Which of the following changes would lead, according to the Solow model, to a higher level of long-run output per worker? a. An increase in the saving rate b. A lower level of capital per worker c. A decrease in productivity d. A rise in the rate of population growth

4. In the long run, a reduction in productivity will cause a. an increase in the capital-labor ratio and a decrease in consumption per worker b. a decrease in the capital-labor ratio and a decrease in consumption per worker c. a decrease in the capital-labor ratio and an increase in consumption per worker d. an increase in the capital-labor ratio and an increase in consumption per worker

5. An increase in the growth rate of population in a steady-state economy would cause a. a pivot down and to the right in the investment line b. a parallel shift downward in the investment line c. a pivot up and to the left in the investment line d. a parallel shift upward in the investment line 1 2

6. In the efficiency wage model, an increase in productivity would a. have no effect on either output or the real wage b. increase output but have no effect on the real wage c. decrease the real wage but have no effect on output d. increase output but decrease the real wage

7. Keynesian economists believe that in the short run, a. money neutrality does not exist and prices adjust rapidly b. money neutrality does not exist and prices do not adjust rapidly c. money neutrality exists and prices adjust rapidly d. money neutrality exists and prices do not adjust rapidly

8. If the expected inflation rate is unchanged, a fall in the natural rate of unemployment would a. not shift the Phillips curve b. shift the Phillips curve to the left c. shift the Phillips curve to the right d. shift the Phillips curve to the left and shift the long-run Phillips curve to the right

9. Classical economists believe that in the short run, a. money neutrality does not exist and prices adjust rapidly b. money neutrality does not exist and prices do not adjust rapidly c. money neutrality exists and prices do not adjust rapidly d. money neutrality exists and prices adjust rapidly

10. The fact that the long-run Phillips curve is vertical implies that a. money canât affect inflation in the long run b. money is neutral in the long run c. monetary policy canât affect unemployment d. there is a natural rate of inflation

1. Briefly explain the shape of the per-worker production curve in the Solow model. If investment per worker initially exceeds saving per worker, how is the steady state capital-labor ratio achieved?

2. Describe the effects of a rise in the domestic real interest rate on the exchange rate and on both domestic and foreign net exports.

3. For each of the following changes, what happens to the real interest rate and output in the short run, before the price level has adjusted to restore general equilibrium? a. Wealth declines b. Money supply declines c. The future marginal productivity of capital declines d. Expected inflation rises e. Future income rises

Question 3

According to Joseph Schumpeter, the theory of creative destruction describes a process by which

	A	some new products unleash a gale of destruction that drive other new products out of the market.
B		new products unleash a gale of destruction that drives old products out of the market.
C		new products are created by the destruction of capital.
D		the creation of new products never involves the destruction of old products.

Question 4

Which of the following countries had the highest GDP per capita in 2012?

		A Qatar
B		United States
C		Japan
D		Norway

Question 5

________ save a ________ of their income. This ________ capital in their economy and raises economic growth.

	A	Developing countries; large proportion; decreases
B		Developing countries; small proportion; increases
C		High-income countries; large proportion; increases
D		High-income countries; small proportion; increases

Question 6

The demand for loanable funds is determined by the willingness of ________ to borrow money to engage in new investment projects.

A		government
B		households
C		banks
D		firms

Question 7

The U.S. economy has been more stable since 1950.

True

False

Question 8

When the economy reaches a trough in a business cycle, which of the following will occur?

A		Income, production, and employment will continue to fall.
B		Income, production, and employment will begin to rise.
C		Income and production will rise, but employment will continue to fall.
D		Employment rises, but income and production will continue to fall.

Question 9

In a closed economy, what is the relationship between saving and investment?

A		Saving is greater than investment.
B		Investment is greater than saving.
C		Investment is equal to saving.
D		Investment may be greater or smaller than saving.

Question 10

The per-worker production function shows the relationship between ________ per hour worked and ________ per hour worked, holding ________ constant.

A		labor; real GDP; technology
B		capital; real GDP; technology
C		labor; capital; real GDP
D		capital; labor; real GDP

Question 11

New growth theory states that increases in ________ capital will result in ________ at the ________ level.

	A	knowledge; increasing returns to scale; firm
	B	physical; decreasing returns to scale; firm
	C	knowledge; decreasing returns to scale; economy
D		knowledge; increasing returns to scale; economy

Question 12

Which of the following is not a reason why the Industrial Revolution occurred when and where it did?

A		The British government was committed to upholding private property rights.
B		The British government was able to eliminate arbitrary increases in taxes.
C		The British government was able to more easily seize wealth.
D		Institutional changes by the British government helped protect wealth.

Question 13

Growth in real GDP per capita for the world economy was greatest during

A		the seventeenth century.
B		the eighteenth century.
C		the nineteenth century.
D		the twentieth century.

Question 14

Which of the following is a normative statement about economic growth?

A		Economic growth is associated with higher labor productivity growth.
B		Economic growth increases GDP per capita.
C		Economic growth hurts developing countries.
D		Foreign direct investment stimulates economic growth.

Question 15

The effect of a recession on a company like Whirlpool Corporation is such that

A		sales decline more sharply for Whirlpool as compared to firms that do not produce durable goods.
B		profits fall less sharply as compared to firms that do not produce durable goods.
C		the decline in sales is more short-lived as compared to firms that do not produce durable goods.
D		there is no difference in the impact of the recession on its profits as compared to firms that do not produce durable goods.

Question 16

For the recessions in the United States since the 1950s,

A		cyclical unemployment has been non-existent.
B		unemployment rises on average by about 1.2 percentage points 12 months after a recession begins.
C		unemployment falls on average by 2 percentage points 12 months after a recession begins.
D		unemployment rises on average about 5 percentage points 12 months after a recession begins.

Question 17

You are an economic advisor to the president. You are asked to recommend a policy to promote long-term economic growth in the economy. Which of the following policies would you choose?

A		a reduction in sales taxes
B		an investment tax credit
C		a reduction in taxes on luxury yachts
D		All of these

Question 18

In comparison to a government that runs a balanced budget, when the government runs a budget deficit,

	A	the equilibrium interest rate will fall.
	B	business investment will fall.
	C	household savings will fall.
	D	None of these

Question 19

If labor productivity growth slows down in a country, this means that the growth rate in ________ has declined.

A		labor force participation
B		the quantity of goods or services that can be produced by one hour of work
C		the working-age population
D		nominal GDP

Question 20

Policies to promote growth by increasing saving and investment work through

A		decreasing the supply of loanable funds, lowering the interest rate, raising the level of investment in physical capital.
B		increasing the supply of loanable funds, increasing the interest rate, raising the level of investment in physical capital.
C		increasing the supply of loanable funds, lowering the interest rate, lowering the level of investment in physical capital.
D		increasing the supply of loanable funds, lowering the interest rate, raising the level of investment in physical capital.

ECON 314 Lecture Notes - Lecture 13: Diminishing Returns

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