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The goods market of a closed economy obeys the following equation system: C = 50 + 0.9(Y T) Z = C + I + G,

The goods market of a closed economy obeys the following equation system:

C = 50 + 0.9(Y T) Z = C + I + G,

with the given exogenous values

I = 100, G = 600, T = 500.

a)Determine the equilibrium values for output at Y = Z, for C, and for disposable income Y T = YD. Evaluate the scal multiplier.

b)This equilibrium is unsatisfactory, as government expenditures exceed revenues and thus public saving is negative. Determine the values for G and T that are required to fulll the condition G = T and nevertheless keep output Y at the same level. Evaluate C and YD.

c)Suppose the government now increases G as well as T by the same amount, say by 100. By how much does Y change if at all? The corresponding value Y/G is called the balanced-budget multiplier.

Now re-consider the original economy in (a), i.e. without assuming G = T, but assume that taxes T depend on output T = 0.2Y. Determine the scal multiplier for this modied model

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