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Si i . = S Si2,
, S=1 , , =1. n , , =1/n.
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(HYPERLINK "http://ru.wikipedia.org/wiki/%D0%90%D0%BD%D0%B3%D0%BB%D0%B8%D0%B9%D1%81%D0%BA%D0%B8%D0%B9_%D1%8F%D0%B7%D1%8B%D0%BA" \o " " . Herfindahl-Hirschman index) ( , ) HYPERLINK "http://ru.wikipedia.org/wiki/%D0%9C%D0%BE%D0%BD%D0%BE%D0%BF%D0%BE%D0%BB%D0%B8%D1%8F" \o "" , .
INCLUDEPICTURE "http://upload.wikimedia.org/math/b/e/4/be46210a23924102afd202800dba1b39.png" \* MERGEFORMATINET,
S1,S2 ,
, , 10000. H = 502 + 502 = 5000, 100 1% H = 100. .
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10000 ( ) INCLUDEPICTURE "http://upload.wikimedia.org/math/1/3/9/1398017312989ef7955c425fbd0fc1df.png" \* MERGEFORMATINET , n ( ) HYPERLINK "http://ru.wikipedia.org/wiki/%D0%98%D0%BD%D0%B4%D0%B5%D0%BA%D1%81_%D0%A5%D0%B5%D1%80%D1%84%D0%B8%D0%BD%D0%B4%D0%B0%D0%BB%D1%8F" \l "cite_note-0#cite_note-0" [1].
1982 . HYPERLINK "http://ru.wikipedia.org/wiki/%D0%A1%D0%A8%D0%90" \o "" HHI : HHI<=1000 ; 1000 < HHI < = 1800 ; 1800<HHI , ΔHHI<=50, , Δ HHI>100 HYPERLINK "http://ru.wikipedia.org/wiki/%D0%92%D0%B8%D0%BA%D0%B8%D0%BF%D0%B5%D0%B4%D0%B8%D1%8F:%D0%A1%D1%81%D1%8B%D0%BB%D0%BA%D0%B8_%D0%BD%D0%B0_%D0%B8%D1%81%D1%82%D0%BE%D1%87%D0%BD%D0%B8%D0%BA%D0%B8" \o ": " [ 404 ].
, , , . :