EC140 Lecture Notes - Lecture 11: Output Gap, Phillips Curve, Nominal Rigidity

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14 Mar 2016

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Ec140 lecture #11: from short-run to long-run the adjustment of factor prices. The short run factor prices are assumed to be constant technology and factor supplies are assumed to be constant. The adjustment of factor prices factor prices are assumed to adjust in response to output gaps technology and factor supplies are assumed to be constant and therefore y* is constant. The long run factor prices have fully adjusted technology and factor supplies are changing. Technology and factor supplies are constant/exogenous real gdp (y) is determined by ad and as. Technology and factor supplies are constant/exogenous factor prices adjust to output gaps; real. Gdp eventually returns to y* to see how output gaps cause factor prices to change and why real gdp tends to return to y* Technology and factor supplies are changing potential gdp (y*) grows over the long run to understand the nature of long-run economic growth. The adjustment process potential output and the output gap (y y*)

Related Questions

Please help wtih these economics questions. I'll give the best answer to the person who justifies their answer.. or someone who does well in economics and knows the subject area well.

Which of the following statements is not true about Say's Law?

A. People produce more goods than they want for their own use only if they seek to trade them for other goods.

B. Markets would be regularly hit by severe shortages and surpluses.

C. Desired expenditures will equal actual expenditures.

D. Surpluses will be eliminated by falling prices and shortages will be eliminated by increasing prices.

Which of the following is not an assumption of the classical model?

A. Buyers and sellers react to changes in relative prices.

B. Households want to maximize economic well being.

C. Wages and prices will move freely in the upward direction but not the downward direction.

D. No single buyer or seller of a commodity can affect its price.

Money illusion is

A. when people think they are better off when their income increases even though prices have increased by the same amount.

B. when people are motivated by self-interest.

C. could not exist if the economy did not have competitive markets.

D. a basic condition that all classical economists assume people have.

Saving is not a problem in the classical model because

A. interest rates were flexible and savings were channeled into investment.

B. savers and investors were the same people.

C. the classical economists assumed that saving was beneficial to people for retirement.

D. saving would be spent by consumers eventually.

Which of the following statements is true?

A. There is an inverse relationship between investment and the interest rate.

B. There is no relationship between investment and the interest rate.

C. There is a direct relationship between investment and the interest rate.

D. Investment is always less than savings.

In the classical model, high unemployment due to either a demand or a supply shock

A. will return to its normal level quickly as wages adjust.

B. will persist if due to a supply shock but not if due to a demand shock.

C. can persist for an indefinite period of time.

D. never exists because unemployment can never deviate from its normal level.

The classical model makes little distinction between the long-run and short-run because

A. the model has not been fully developed yet.

B. prices adjust so fast that the economy is quickly moving towards the long-run.

C. the classical economists knew that we are always operating in the short run.

D. current changes influence the long run, so it is not possible to plan for the future.

In the classical model

A. the level of real GDP per year does not depend on the level of aggregate demand.

B. the level of GDP is demand determined.

C. the level of GDP determines prices independent of demand.

D. changes in aggregate supply affect the price level, not real GDP.

Which of the following is a true statement?

A. Classical economists believed output adjusted more than prices when aggregate demand fell while Keynes believed prices adjusted more than output.

B. Classical economists believed price adjusted more than output when aggregate demand fell while Keynes believed output adjusted more than prices.

C. A decrease in aggregate demand has no short-run effects according to the classical economists, but had significant effects according to Keynes.

D. A decrease in aggregate demand was not possible according to the classical economists, but was possible according to Keynes.

Which of the following is not a reason why GDP can be expanded beyond a level consistent with its long-run growth path in modern Keynesian analysis?

A. Prices and wages are flexible allowing for needed adjustments.

B. In the short-run existing workers can work more hours.

C. The existing capital stock can be used more intensively.

D. Higher prices induce firms to hire more workers.

A recessionary gap can be caused by

A. a decrease in aggregate supply holding aggregate demand constant.

B. an increase in aggregate demand holding aggregate supply constant.

C. an increase in the long run aggregate supply curve holding the aggregate demand constant.

D. a decrease in both aggregate demand and aggregate supply.

lemonpug153

In the AD-AS model, stagflation does not persist, because the working of the self-correcting mechanism of the economy _____ the level of output and _____ the price level until the economy eventually returns to a long-run equilibrium state, where actual output _____ potential output.

	decreases; decreases; falls short of
	increases; decreases; equals
	decreases; increases; exceeds
	decreases; increases; equals
	increases; decreases; exceeds

The LRAS curve is drawn as a vertical line at potential output (Y*) to indicate that

	Y* is independent of the price level and that actual output Y > Y* in the long run
	Y* equals actual output (Y) in the long run
	Y* is independent of the price level and that actual output Y = Y* in the long run
	Y* is independent of the price level
	Y* is independent of the price level and that actual output Y < Y* in the long run

Stagflation arises in the context of the AD-AS model when some external factor causes

	the LRAS curve to shift to the right
	the AD curve to shift leftwards
	the SRAS curve to shift downwards
	the SRAS curve to shift upwards
	the AD curve to shift rightwards

If the SRAS curve is positively sloped, then a decrease in the demand for Canadian-made goods in Europe will lead to _____ in the price level, in the short run.

	either an increase or a decrease
	no change
	an increase
	a decrease
	an initial increase, and then a decrease

Which of the following will shift the aggregate demand curve to the right?

	Consumers become pessimistic about the future
	A new technology is developed that will increase profits
	Income taxes are raised
	Foreign economies fall into recession, reducing their demand for domestic exports
	The government reduces purchases to balance the budget

Suppose a stock market crash decreases the stock of household wealth and therefore causes autonomous consumption to fall. Which of the following is the likely result?

	A leftward shift the AD curve
	There will be no movement of the AD curve
	A movement down the AD curve
	A movement up the AD curve
	A rightward of the shift the AD curve

An economy is characterized by the AD equation P = 200 ? 0.02Y, SRAS equation P = 100 and LRAS equation Y* = 5000. In the absence of any change in policy or exogenous shocks, this economy will achieve a long-run price level of

	100
	110
	120
	90
	105

The AD-AS model depicts a self-correcting economy. This means that the price level in the model adjusts automatically in response to a(n) _____ gap, so as to eliminate the _____ gap in the long run, without requiring any help from government policies.

	recessionary; recessionary
	recessionary; expansionary
	expansionary; expansionary
	output; output
	expansionary; recessionary

The aggregate demand curve shows

	the amount of planned aggregate expenditure (and output) at the current price level
	the amount of planned aggregate expenditure (and output) at an average price level
	the amount of planned aggregate expenditure (and output) at a constant price level
	the amount of planned aggregate expenditure (and output) at various price levels
	the amount of planned aggregate expenditure (and output) at last year's price level

Consider an economy initially at long-run equilibrium with output (Y) equal to potential output (Y*). If the SRAS is positively sloped, then a shift to the right of the AD curve will lead to _____ in the price level, in the short run. In the long run, the SRAS curve will shift to the _____ and the equilibrium will be at __________.

	an increase; left; Y = Y*
	a decrease; right; Y > Y*
	an increase; right; Y = Y*
	a decrease; left; Y > Y*
	no change; left; Y = Y*

Question:

Is it true that in a short-run production process, the marginal cost curve eventually slopes upward because firms have to pay workers a higher wage rate as they produce more output? Explain your answer.

Answer:

The marginal product of labor is the increase in output resulting from a one-unit increase in the amount of labor employed. In my own opinion, the statement can be true in the sense that, as the firm produces more and more the cost of production has to come down first; that becomes constant or minimum and then starts to increase. The marginal cost is also a U-shaped curve that first falls then reaches a minimum and starts rising. The reason for rising marginal costs in the short term will only be an increase in the wages as the only factor which is variable in the short-run is labor whereas all factors are kept fixed, so the fixed costs will keep coming down. If you increase labor, you are going to suffer from diminishing marginal returns. And in the long-run, one will suffer diminishing returns from both input factors, labor, and capital.

The short-run cost relationship between the marginal product of labor and the marginal cost, the labor is variable. We have already established that there are diminishing marginal returns because the labor decreases. To increase output in the short-run, a firm must increase the amount used of a variable input. The marginal product reduces, not because consecutive workers are lesser, but because more workers are being used relative to the amount of equipment that is available, what they have left to work with. An example; if a clinic has only one dentist on duty and several assistants are available and we have a lot of patients waiting to see that doctor, the number of patients served by this office cannot increase without limit. The excess assistants will not be able to increase the number of patients in the office, not because they are not reliable or good enough, but because they cannot perform the doctor's job ad there is only one doctor in the office.

https://www.quora.com/Why-does-the-marginal-cost-curve-slope-upwards

I need a peer reply for this.

beigejackal19

EC140 Lecture Notes - Lecture 11: Output Gap, Phillips Curve, Nominal Rigidity

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