.
Y(1 - t) = C + S, S , :
S = Y(1 - t) C,
C = a + bY(1 - t),
S = Y(1 - t) a bY(1 - t) = - a + (1 - b)Y(1 - t).
a = Ca, b = MPC, Y(1 t) = Yd,
S = - Ca + (1 MPC)Yd.
1 MPC = MPS ( ),
S - - , :
S =
:
S = - Ca + MPS × Yd
C + S = Yd, MPC + MPS = 1.
. 4.5
C,S
MPC
Ca S = - a + (1 - b)Yd
0 Yd
-Ca MPS Yd0
4.5:
Yd0 . , :
Yd < Yd0 Þ C > Yd, S < 0
Yd = Yd0 Þ C = Yd, S = 0
Yd > Yd0 Þ C < Yd, S > 0
( , , , ..) . , ( ) Y (= ), (.4.6):
. 4.6
C C = Ca + MPC(1 t)Y
MPC(1 t)
Ca
0 Y
. , . , , , .
.
(. 4.7 ) Þ (. 4.7 ):
S(r) = Yd C = - Ca + Ydar
C(r) = Ca + Yd - Ydar = Ca + Yd(1 - ar),
Ca ,
Yd ( ),
r - (),
a -, (= ), 1 .
.4.7
r r
S(i)
C(i)
-Ca 0 S 0 Ca C
, , . , , , , : (. 115)
|
|
. r. , , . , :
r = i πe
, r i, :
= r
( ) (.. P const.), , () i. , .