Secondary Data Sources: 

Internet Usage

Audit Central
A joint venture of the three main interactive auditing companies (ABC Interactive, BPA Interactive, and Engage/IPro) allows for free searches of audience and traffic information for any site that has been audited by any of the three companies.

CyberAtlas
Excellent, and searchable, database of online news and facts, tracked since 1998. Often provides reports of Internet usage data that might otherwise be hidden from public view.

eMarketer
Internet statistics for the e-commerce user and provider, aggregated from leading sources worldwide, filtered and analyzed. Lots of free statistics, with longer reports available for a fee.

Forrester
Internet analysis firm offers Technographics® research data on attitudes and behavior of Internet users; most full reports are only available for a fee, but some can be viewed using free guest access.

Jupiter Research
Internet commerce consultancy offers reports for a fee, but site also has data available for free with guest access.

Nielsen/NetRatings
Weekly and monthly ratings of top-10 websites, as well as online advertisers, most popular ad banners, and web usage data. Data is regularly updated and is some of the most current available.

Pew Internet And American Life
Access studies that explore the impact of the Internet on children, families, communities, the workplace, schools, healthcare and civic/political life, from this nonprofit initiative of the Pew Research Center.

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