.
. . - ( , ). : , . . .
- . . , .
.
(barriers for a branch) .
(breakeven point) , ATC, , .
(long-run supply curve of industry) , , .
(competition) , -.
(contestable market) , .
(short-run supply curve)
(profit maximization) , .
(monopolistic competition) , , , , . .
(monopoly) ; , , , .
(competition imperfect) , - , ( ) , .
(oligopoly) , ; , .
(optimal positive output) , , .
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(increasingcost industry) , , , .
(constantcost industry) , , , .
( decreasing - cost industry) , .
(total-revenue-total-cost approach) , , () .
(marginal revenue marginal cost approach) , ( ), .
(perfect competition) , , .
(market structure) , , , , ; , .
(break-even point) , (), .
(shut-down point) , .
(productive efficiency) ; ; , .
(allocative efficiency) , , (); , .
4.
. . .
. ( , ).
.
: , , .
.
. .
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(Barriers to competition) , , .
(Natural monopoly) , .
(Closed monopoly) , , .
( . μονο πωλéω ) , , .. / , .
(monopoly power) , , , . , .
(Open monopoly) , - , - .
́ ́ (Absolute monopoly) , .
- (onopolistic company) .
(Price discrimination) , , . .
- (X-inefficiency) .