. , , .
:
- ( ) - NPB ( . net present benefit);
- - BCR ( . benefit-cost ratio);
- ( ) -IRR ( . internet rate of return).
NPB :
NPB = Y,B,V,-HGV' (64)
Bt - t;
Vt - ,
V = (1 +?■)'';
: - t;
- ;
- .
NPB.
BCR - , . .
BCtf = i>v/]£c,V,. (6.15)
, BCR>\.
IRR - () , , , NPB , , . IRR :
ii^y=- ()
IRR , , . , , . . , i , ;:< . , - . , , ( ). , , 1,3 , . . , - . , , . . , , , . 3-4 , .
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