, . , , (MC) (MB). , , , , . . , , , , , . , , , . , ( ), . .
-, . . , , . ( ), .
, . . , , . .
, .
1. ( ), . . , .
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2. , , , .
3. . , ( ) : , - .
4. . (-, .) .
(public goods) , .
(nonexclusive good) , .
(noncompetitive good) , .
(public goods cost-benefit analysis) , , , , .
, (free-rider problem) ; .
(individual demand on public goods) , .
(aggregate demand for public goods) .