: , .
. :
C = c(Y-T), - ; - ; Y - ; - .
Y*, :
= c(Y*-T) = C =const.
, . , ( - ) .
I =I(r).
, , , , .
G, , .
, r:
Y=C + I+ G = c(Y*-T) + G + I(r).
.
, . , .
( ), :
, . ,r1>r0, , , I(r1)<I(ro), , , , Y1 < Y*. , . , , :
r = r0, Y=C + I+G =Y*.
r0. , , . , . . - . , , , , , .