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. , , . . , .. , , . . , . , .

. . . . , . , , , . , . ,

, . , . ( ) . - , , . .

. , 40- . . ( , ).

, , . , . , K/Y . , , .

(∆I), , :

 

∆YAD = ∆I m = ∆I 1/1 MPC = ∆I 1/ MPS,

m ;

MP ;

MPS .

:

 

∆YAS = δ ,

 

δ ( ).

(∆I), :

 

∆YAS = δ ∆I

 

, .. AD = AS. , :

∆I / MPS = δ ∆I ∆I / I = δ MPS,

 

.. .

δ , , , , MPS ( ).

, I = S,

S = MPS x Y, MPS, , , :

 

∆Y/ Y = ∆K / K = ∆I / I = δ MPS

 

, . , , . , ∆Y/ ∆.

:

∆I / It-1 = ∆Y/ Yt-1 = ∆K / Kt-1 = ∆L / Lt-1 = δ MPS

, .

. , , .

1939 . , , . : .

, .

( ). :

, ;

(∆ K/Y) ;

.

, () () , .

 

It = α(Yt Yt 1),

α .

, , :

) , ;

) , ;

) , . .

:

 

It α(Yt Yt 1)

Yt d = ── = ────────AD

MPS MPS

, , ..

s s

Yt-1 Yt 2

Ys = Ys (n ────────── +1) → AS

t t-1 Ys

t-2

n = 1 .

 

. , , .. n =1, :

 

Yt d = Yt s = AD = AS

 

AD AS .

 

d d s s

α(Yt Yt 1) Yt-1 Yt 2

──────── = Ys (n ────────── +1)

MPS t-1 Ys

t 2

, :

 

∆Y MPS

─── = ────── = ──────────

Yt 1 α MPS

(Gw) . :

();

;

;

(Gn). , (Gn). , . .

, .

-. . , (MPS), .

, , , ( ), .

-. . 1920-1950- ., (50- 70- .) . .

 





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