Những hạn chế về điều tra thị trường dân số trên internet? Những cách khắc phục ở hiện tại và tương lai?

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U.S./Canada
182.8 (33%)
Europe/Middle

East
141.6 (27%)
Asia Pacific
110.0 (21%)
Latin America
13.4 (3%)
Rest of World
83.5 (16%)
Millions of People With Home Internet Access by Region in 2002
Source: Data from Nielsen//NetRatings
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