, , .
. , , .
, , , (market equilibrium), . 11. ( . qulbrum ). ֳ, , (equilibrium price) (). ʳ , , (equilibrium quantity)(QE).
. 11. г
E = PS = D,
E ;
PS ;
D .
³, Q = QS = QD,
Q ;
QS ;
QD .
(partial market equilibrium), , (general equilibrium), . .
. QD = a bP, QS = c + dP, a, b, c, d , Q = a bP = c + dP.
,
.
г , 䳿 . , . , , () (consumer surplus). , , (. 12). , , , () (producer surplus) (. 12), (economic profit). , , , , , (. 15).
(social surplus), . , , , .
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. 12. ,
. , (. 12 ), (. 12 ).
. 12 , , , . ( , , , .). ֳ : ( ) ( , ) . , ( ()), , , . , .
. 12 . ֳ . 12 .
г , . , . , .
. . , , ( (excess demand)), . ( (excess supply)), , .
. (Q 2 Q 1 . 13 ), (P 2 1 . 13 ). . , . , . () .
. 13.
( . . )
. , . .
, , (cobweb model) (. 14). (, ), , , . , ( ). .
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