(aggregate demand AD) (, , ) . :
, .. (consumption demand);
, .. I (investment demand);
, .. G (government spending);
, .. Xn (demand for net export).
:
AD = C + I + G + Xn.
, .. , .
, , , .
:
C = Ca + bY,
Ca ( Y ); b .
APC ( . averagepropensitytoconsume) , .
MPC1 ( . marginalpropensitytoconsume) .
, APS , . , , , .
Yv.
C = Ca + bYv
Yv = Y tY = Y(1 t),
t .
, , , , , .. . .
C(i) = Ca+ Yv ai,
i 1; a ( ( ), ).
Y = C + S, .
.
|
|
:
S = Ca + sYv,
s MPS ( .
marginal propensity to save).
, b + s = 1, .. Y = C + S => ∆Y = ∆C + ∆S. :
; b = 1 s;s = 1 b
S(i) = Ca+ ai.
, , . , . .
, :
1) ;
2) ;
3) ;
4) ;
5) ;
6) .
, , . , , , , .
, , , .