IS ( ) . (r) (Y), . S=I
, . . :
. AD=C(Y)+I(r)
(Y), :
.. AS=C(Y)+S(Y)
: AD=AS C+I=C+S, :
. S(Y)= I(r)
.
, .
(IS). (r) (Y), .
IS , , , (Y) (r) .
IS , , . , , , . .
. 3 -
, IS (. 3).
IS , Y r, , .
IS : , IS , . . ( ). IS ( , ). [3. .467]
. , . Y S, , S I. (. 3) IS.
, , , .. , . , .
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, , , (G) (), IS .
, , , IS . , , IS .
, IS - () .
IS . , Y R, , , . IS . IS (Investment=Savings).
IS