214                                                    8

N
/,=:I>,(,/+P,//^+e,^)=

(8.10)

N                   N                      N

= IA",/ +   1>,,7  ', + i>,?,/ = ",/ + ,/1-/ + ń/ ,

I- I          I- I            1= 1



N

^I^,01,/;                                (8.106)

/-i

'

,/=^,/;                                (8.10)

/=i

N

epI=Y^xlsu                              (8. )

i=i

  (8.106)  (8.10) ,      -
  ( /)   ( /)    -
      ,      
   .    (8. )  -
  ( ,)      -
,           .  -
,        
  ,    (8.3)".

  (8.10) ,    ,  
    2 ,   :

^2/"^.                            (8-113)


' N          V

'/= 1>,,/ .                            (8.116)

L'~'

,        -
,    :

N

<=I>k2,.                                 (8.11)
(= i

 (8.1 la) ,        ,
       .  -
      (2^)    (2,).

  ,    (diversification)  
    .     -