# Answer to Question #59136 in Macroeconomics for John Doe

Question #59136

QUESTION. AD-AS Consider a theoretical framework where the short-run AS describes, as usual, a positive relationship between the price and output levels. The AD is obtained by combining the following equations:

C = c0 + c1(Y − T)

I = d0 − d2i

T = t0 + t1Y

L = f1Y − f2i

with G = G0 and M = M0.

Starting from a long run equilibrium allocation, assume that autonomous consumption

decreases, ∆c0 = x < 0

a) Represent graphically (AD-AS plot) the short run effect indicating if and how output

and price change

b) Moving from the starting long-run equilibrium to the short-run equilibrium, indicate if

and in which direction the following variables have changed: i interest rate, I invest-

ment, C consumption, T taxation, G public expenditure, w nominal wage

C = c0 + c1(Y − T)

I = d0 − d2i

T = t0 + t1Y

L = f1Y − f2i

with G = G0 and M = M0.

Starting from a long run equilibrium allocation, assume that autonomous consumption

decreases, ∆c0 = x < 0

a) Represent graphically (AD-AS plot) the short run effect indicating if and how output

and price change

b) Moving from the starting long-run equilibrium to the short-run equilibrium, indicate if

and in which direction the following variables have changed: i interest rate, I invest-

ment, C consumption, T taxation, G public expenditure, w nominal wage

Expert's answer

C = c0 + c1(Y − T), I = d0 − d2i, T = t0 + t1Y, L = f1Y − f2i, with G = G0 and M = M0.

If autonomous consumption decreases, ∆c0 = x < 0, then:

a) Then according to decrease in consumption and in total aggregate demand (AD) the output and price will decrease.

b) Moving from the starting long-run equilibrium to the short-run equilibrium, interest rate (i) will decrease, investment (I) will decrease, consumption (C) will decrease, taxation (T) will decrease, public expenditure (G) will not change and nominal wage (w) will not change too.

If autonomous consumption decreases, ∆c0 = x < 0, then:

a) Then according to decrease in consumption and in total aggregate demand (AD) the output and price will decrease.

b) Moving from the starting long-run equilibrium to the short-run equilibrium, interest rate (i) will decrease, investment (I) will decrease, consumption (C) will decrease, taxation (T) will decrease, public expenditure (G) will not change and nominal wage (w) will not change too.

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