- , ; .
Ct = Ca,t + Cyyt-1, Ca - .
, , ,
It = Ia,t + (yt-1 - yt-2).
,
At = a,t + Ia,t.
(9.1) - , .
(At = A = const) , , .. yt = yt-1 = yt-2 =... = yt-n = , n - .
(9.1) , = A/(1 - Cy).
, , .
(9.1). yt (9.1), - :
, | (9.2) |
yt yt - .
yt = + yt, yt yt.
- 4 , yt . (Cy + )2 - 4 , , .
. 9.3. Cy, η
(Cy+η)2-4η>0, yt ; (Cy+η)2-4η<0 . , , . 9.3, Cy, η, yt, Cy, η, yt.
yt , . η < 1, . η > 1 1 . η = 1, yt .
Cy , . 9.3. Cy I, yt Cy , II, , . Cy , , B , . Cy, III, yt . Cy, IV , yt . , , yt.
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