Dig this, from Department of Transportation records: As Ad Age points out, in 1978 three quarters of 17 year-olds had licenses (and nearly half of 16-year-olds).
The article points out that ad agencies ignored older consumers for 40 years, focusing instead on selling to young people on the belief that it is best to reach that age group before they settled on brand preference.
Company Transformations: James points out that the online ad business has lots of growth ahead of it and will likely be adopted by more traditional tech companies.
David Poltrack of CBS said that interviewees often under report TV watching, and that the research by Arbitron that is usually cited -- which conveniently points to more viewing and therefore more ad dollars -- is machine-recorded, and therefore more reliable.
Microsoft said its mapping services provide other measurement points about online sales such as the amount of space the ad takes up on a Web page and how many times a user sees an ad.