(AD - aggregate demand) , .
, , .. AD = C + I + G + Xn, :
C ( ),
I ( ),
G
Xn ( Im).
.
() , .
(S) , .
(Y) ( ) = () + (S)
:
1.
2. .
3. ( ).
(marginal propensity to consume m) , , () () :
(marginal propensity to save mps) , , () () :
1.
( ).
:
= + Y,
- (.. )
(m)
:
S = - + SY,
S (m s)
, :
Y = WN + V, :
W -
N -
V - ( )
.
, .
: I = S
, .
.
I = DI / DY
, (S > I).
- , , () () () .
|
|
m = 1 / (1 )
:
DY = m DI
DY = m D
:
DI = m DY
- .
. 3 :
-
-
-
:
-
-
- .
, .. , .
( ).
Y = C + I + G + Xn, Y C G = I + Xn, S = I + Xn
Xn = S - I