1. ( ) :
Y = C + I + G + NX.
2. . , , , . :
= + .
, , = + .
.. , , , , :
C + I = S + C I = S.
(Sp), (Sg) (Sr):
S = Sp + Sg + Sr.
= (Y), (TR), % (N) (T) (C):
Sp = (Y + TR + N T) .
:
Sg = (T TR N) G.
, . , (BD):
BD = - Sg.
= , (IM), ():
Sr = IM X Sr = - NX = - Xn.
, , .
Sp + Sg + Sr = (Y+TR+N-T) C + (T-TR-N) G + (- NX) = Y C G NX;
S = I.
3. . . , 2 : . , .
Sg = - (ΔM + ΔB),
ΔM ;
ΔB - .
. , :
BD = - Sg BD = ΔM + ΔB.
:
Sp = I + ΔM + ΔBp.
: Sr = ΔBr.
: S = I.
, , (ΔB), (ΔB), (ΔBr), .. ΔB = ΔB + ΔBr.
- . () . () . . , . , , , . . . .
, .
, , , , 1.