微观经济答案（Microeconomic answer）.doc

微观经济答案（Microeconomic answer） The third chapter is product market and money market equilibrium 5, the investment function is i=e-dr (1) when i=250 (USD) - 5R, find the amount of investment in r equal to 10%, 8% and 6%, and draw the investment demand curve; (2) if the investment function is i=250 (US $) - 10R, find the amount of investment in r equal to 10%, 8% and 6%, and draw the investment demand curve; (3) illustrates the impact of the increase in E on the investment demand curve; (4) if i=200 - 5R, how will the investment demand curve change? Answer: (1) i=250 - 5 x 10 = 200 (US dollars) I=250 - 5 * 8 = 210 ($) I=250 - 5 * 6 = 220 ($) (2) i= 250 - 10 x 10 = 150 (US dollars); I = 250 - 10 * 8 = 170 ($) I =250 10 * 6 =190 ($) (3) an increase in E shifts the investment demand curve to the right (4) if I = 200 - 5R, the investment demand curve will move 50 dollars to the left 6, (1) if the investment function is I = 100 (US $) - 5R, find the amount of investment when the interest rate is r, 4%, 5%, 6% and 7% (2) if the savings are S= - 40 (US dollars) + 0.25y, find the level of investment that is balanced with the above investment; (3) for IS curve and make graphics; Answer： (1) I1 = 100-5 * 4=80 (USD) I2 = 100-5 * 5=75 (US dollars) I3 = 100 - 5 x 6 = 70 (US dollars) I4 = 100-5 * 7 = 65 (US dollars) (2) S = -40 + 0.25y - 40 + 0.25y = 80 * y = 480 ($40) + 0.25y = 75 * y = 460 ($) - 40 + 0.25y = 70 * y = 440 ($40) + 0.25y = 65 * y = 420 ($) (3) IS: I = S function curve of imprisonment 100-5r = -40 * +0.25y R y = 560 - 20R Figure: 8. the table shows the trading demand and speculative demand of the currency The demand for money; the speculative demand for money Income (dollars), demand for money (US dollars), interest rate,%, demand for money (US dollars) 500100600120, 700140800160900180, 123010508706904110 (1) demand for money at $700, with interest rates of 8% and 10%; (2) seeking the monetary requirements of the income of 600700 and 800 dollars at various interest rat