Macro - Long Run II
description
Transcript of Macro - Long Run II
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1 ;
, , , NX. : (C), (I) (G).
Y = C + I + G + NXY = C + I + G + NXY = C + I + G + NX
(/GDP)
(/GDP)
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2
C = C(Y- T) C = C(YC = C(Y-- T) T)
C
Y-T
(/MPC)
C = C(
Y-T)
C = C(
C = C(
YY--T) T)
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(MPC) (Y-T) . : ( ...) MPC, 0.99 ( MPC 1...). 0.99.
MPC (C), , (Y-T).
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4
, . , , , . . . .
I = I(r)I = I(r)
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5 . . : .
Realinterestrate, r
Quantity of investment, I
I(r)
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G = GG = GT = T T = T
. , G = T, . G > T, , G < T, .
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:
1) Y = C + I + G 2) C = C(Y-T) 3) I = I(r) 4) G = G 5) T = T
1) Y = C + I + G 2) C = C(Y-T) 3) I = I(r) 4) G = G 5) T = T
, . , , .
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8 . :
, Y. (1)-(4) , :
Y = C (Y - T) + I (r) + G
, :
Y = C(Y-T) + I(r) + G
Y = F ( K , L )= Y
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9 , r, . : . , : C + I + G.
, . , . , .
.
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, : Y - C - G = I. Y C - G . (S). , .
, :
(Y T - C) + (T - G) = I
(Y T - C) , . (T - G) , . .
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, :
Y - C (Y - T) - G = I (r)
, G T ( ), :
Y - C (Y - T) - G = I (r)S = I (r)
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, S
, r
, I (r)
, , I, S
. . .
. . .
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: DG, DG. , . , . . , . , . , (crowd out) .
: . DT, DT x MPC. MPC, . .
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CROWDING OUT
, . . .
, , I(r)
r
, S
S
S'
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Investment, Saving, I, S
I1
Realinterestrate, r
Saving, S
S
I2A
B
. , . . , .
, ( ).
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Investment, Saving, I, SI1
Realinterestrate, r
S(r)
I2AB
, S(r), , . , .