2) The following describes a certain economy C = 400 + 0.75Id    consumption function  I = 200 – 100r            investment function T = 70 + 0.2Y              Tax Function G = 100                      Government Expenditure X = 10                         Exports M = 150 + 0.06Y        Import Function Ms = 4000                Money Supply M^D = 0.2Y – 10r      Money Demand Required a) Derive the IS and LM  equation b) Calculate the equilibrium Y, C, T, M, and I

• Assuming that there is no government spending or trade, an economy's GDP is the sum of domestic consumption C and investment I, ie. Y = C+ I • Assume that I is unaffected by GDP • Assume the consumption function is C = co + cY • In any equilibrium aggregate demand, AD must be equal to Y, GDP. Given this model, which of the following statements is correct? This question is worth 2 marks! Select one or more: a. The aggregate demand equation is given by AD = co + CY + I b. c, is equal to autonomous consumption c. if c, is a number between 0 and 1, and I+co >0 then the aggregate demand equation is a straight line that must intersect the 45 degree line at some point. d. In a demand-driven economy the AD curve is a vertical line e. In a demand-driven economy demand is equal to supply in equilibrium f. In a supply-driven economy demand is equal to supply in equilibrium g. In a demand-driven economy, supply creates its own demand h. If the economy above is a demand-driven economy, then the…

Section 2 - Exercises Exercise 1: Automatic stabilisers Assume a closed economy (no import or export) characterised by the following equations describing the behaviour of aggregate demand: Consumption function: C = Co + C₁ (YT) T = to +t₁Y [Taxation rule] Investment and government spending are assumed to be constant: I = I and G = G Where co is autonomous consumption, tå is autonomous taxation, c₁ = 0.6 is the marginal propensity to consume, t₁ = 0.2 is the sensitivity of tax revenues to income. a) Explain why it is reasonable to assume that government tax revenues would respond to changes in income. b) Solve for the equilibrium output in the goods market. c) What is the Keynesian multiplier in this economy? How is it related to the parameters of the model. d) Assume autonomous consumption co falls by £1 Billion. Calculate the change in equilibrium output. e) Represent the effect of the shock on a Keynesian cross diagram. f) Complete the table below and explain in words how the…

Assume that the Marginal Propensity to Consume (MPC) is 0.8. If the multiplier effect is taken into account, the reduction in government expenditure by $ 200 million will shift the overall demand process to the correct order below. A) right, $1,000 million B) left, $ 200 million C) left, $160 million D) left, $1,000 million E) right, $ 160 million

Refer to the data in the table given below. Suppose that the present equilibrium price level and level of real GDP are 100 and $280, and that data set A represents the relevant aggregate supply schedule for the economy. (A) Price Level 100 100 100 100 Real GDP 205 230 255 280 (B) Price Level 110 100 95 90 Real GDP 230 230 230 230 (C) Price Level 110 100 95 90 Real GDP 280 255 230 205 a. What must be the current amount of real output demanded at the 100 price level? Real output demanded = $ b. If the amount of output demanded declines by $25 at the 100 price level shown in A, what will be the new equilibrium real GDP? The new equilibrium level of real GDP = $ In business cycle terminology, what would economists call this change in real GDP? (Click to select)

4. The investment demand curve The following table shows the expected rate of profit and the cumulative amount of investment with that rate of profit or higher in a hypothetical economy. For example, $100 billion worth of investment projects have an expected rate of profit that is greater than or equal to 8%. Put another way, at an interest rate of 8%, the amount of investment demanded equals $100 billion. Expected Rate of Profit Cumulative Investment at this Rate of Profit or Higher (Percent) (Billions of Dollars) 75 INTEREST RATE (Percent) 16 15 14 13 12 + 11 10 2 0 Using the blue points (circle symbol), plot the hypothetical economy's investment demand curve (1) on the graph. Line segments will automatically connect the points. H+++ 10 0 8 6 4 100 25 125 150 50 75 100 126 150 175 200 REAL INVESTMENT (Billions of dollars) Investment Function Determine how each of the following events will shift the investment demand (1) curve. ?

(a) Suppose in a simple Keynesian economy, planned consumption function is given by C=250+0.65(Y-T). Planned investment, government purchases, taxes are $100 million, $100 million and $150 million respectively. What is MPC, MPS and autonomous consumption Derive the saving function. What is the equilibrium level of income? Y= AD=C+I+G If government purchases increase to $150 million, what is the new equilibrium level of income? What level of government purchases is needed to achieve an income of $2000 million? From question e) you get the newly government purchase. Now find out the multiplier value What is the amount of shift in AD curve? [Use the multiplier value from e)]   (b) In a self-regulating economy “X”, labor supply is 40 million but labor demand is 10 million. What will happen in goods and service market simultaneously? Explain this situation with relevant graph. Based on your findings in a) is it denoting long run equilibrium? If not, will the economy be able to restore…

Match the following terms ( terms are labeled 1-10 )to the correct definition(definitions are labeled a through J) aggregate consumption function, multiplier, planned aggregate expenditure (PAE), income-expenditure equlibrium GDP, marginal propensity to consume (MPC), consumption function, unplanned inventory investment, actual investment spending,inventory, autonomous spending A) The amount by which consumption rises when disposable income rise by one dollar marginal propensity to consume (MPC) B) The level of output (real GDP) at which output (real GDP) equals planned aggregate expenditure. income-expenditure equlibrium GDP C) The ratio of total change in real GDP caused by an autonomous change in aggregate spending. multiplier D) Total planned spending on final goods and services in the economy. aggregate consumption function E) The equation showing how individual household's consumer spending varies with its current disposable income. consumption function F) Consumption…

Consider a closed economy with no government, where aggregate demand is determined by autonomous consumption, investment (which is independent of output), and the marginal propensity to consume. a) Given that autonomous consumption is 20, investment is also 20, and the marginal propensity to consume is 0.6, write out an equation for aggregate demand (AD) in this economy. b) Given this aggregate demand equation, and the equilibrium equation Y = AD, use algebra to find the equilibrium level of Y. (2 marks) c) Draw a diagram with output (Y) on the x-axis and aggregate demand (AD) on the yaxis. Draw two lines on this diagram: (i) Y = AD, and (ii) the aggregate demand function from part (a). Label the intercept of the AD line, and the point where the two lines intersect, with numerical values. d) Suppose that the marginal propensity to consume falls from 0.6 to 0.5. What would the new equilibrium level of Y be? Illustrate your answer in the diagram you drew for part (c). e)…

Question 2 Refer to the information provided in Figure 23.9 below to answer the question(s) that follow. Aggregate expenditures ($ millions) 225 200 175 150 45° AE 100 200 300 Aggregate output ($ millions) Figure 23.9 a) Refer to Figure 23.9. Write the equation for the aggregate expenditure function (AE). Show your work. b) Refer to Figure 23.9. What is the equilibrium level of output in this economy? State the equilibrium condition used to determine this. c) Explain the forces that maintain/drive the economy to this equilibrium by considering what will happen at the following two levels of output, $300 million and $100 million. You will need to discuss changes in investment through unplanned inventories and the response of output. d) Refer to Figure 23.9. How will equilibrium aggregate expenditure and equilibrium aggregate output change as a result of a decrease in investment by $20 million? e)The interest rate is an exogenous factor that effects the level of investment in an economy.…