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4. (28 pts) Consider the following macroeconomic model: Y C M = C + Io + Xo - M = a +bY = u +mY a> 0 and 0 <b<1 u> 0 and 0 <m

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103 wu Wer est dwe . - Q Y= C+ Io + Xo M. Y-C+M = 10 +XO. -bytc. to = a. -mytot = fr. 80. a) Matrix form [ 1 - 1 17ry -b. t1

d.) Cramer 8 Y = Rule. lotto - 1 1 T = Totxo ti (a) + 1Coth) 1-b+Qm lo txo + ata 1 1-bt2m y*= To txo - b I. m. u IAI = = 1(Q

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