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crime concentration index

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The Alternative<br />

• Using a 755-foot buffer, the same 22 robberies<br />

are captured<br />

• The area of the buffer calculated<br />

• A new CCI is computed based on the<br />

<strong>concentration</strong> per unit of area in the buffer<br />

• CCI=(22/0.198845)/(907/42.89)=5.23<br />

• This suggests that there are a little more than<br />

4 times as many robberies in this area

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