∆Y / ∆G = 1 / (1 b)
.
:
Y = C + I + G
C = a + bY
Y= + I + G - ; = + bY - .
:
Y = a + bY + I + G => Y bY = a + I + G = Y (I - b) = a + I + G.
Y= (a + I + G) / (1 b), (a + I + G) - , 7, - , , , . , , b (MPC).
Y :
- ; t - .
- :
t = ∆T / ∆Y
t - ; ∆T - ; ∆Y - .
, . , , , .
, .
:
Y = C + I + G + Xn
C = a +b (l - t) Y
Xn = g - m'Y
Y = C + I + G + Xn - ;
= + b (1 - t) Y - ;
X = g - m' Y - .
63. . . . . .
, - . , , , . , .
. . . , . - , , , , .
, , . 200 . . MPC = 1/2 100 . . .
, (. 6.3).
, . 200 . ., , , , .
200 . . MPC = 1/2, 100 . ., 100 . .
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. 6.3.
, , , . , MPC MPS. , , MPS (ΔT MPS). (ΔT MPC).
, . , , . , - , - , - . , , , .
. , .
, 1 . . C + I + G 1 . ., 1 . . C + I + G 1/2 . ., MPC = 1/2. : , . : MT = MPC MG.
.
. ∆, Yd = Y - ∆ (. 25.2). ∆ * b, Y1 Y2
∆Y = - ∆ * b / (1 b)
∆Y/∆ = - b (1 b) - .
, , :
∆↓ =>
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=> ∆↑ =>
=> b * ∆↑ =>
=> b * ∆↑ =>
=> b * ∆↑ =>
=> b(b * ∆)↑ =>
=> b2 * ∆↑ =>
=> b2 * ∆↑ =>
=> b(b2 * ∆)↑ => ..
, , :
= t * Y,
t - .
:
C = a + b (Y - tY) = a + b (l - t)Y,
:
mt - .
:
T = Ta + tY,
- , Y (, , ..); t - .
64. .