Are they educated because they search or do they search because they are educated?

A survey conducted in May 2008 by Pew Internet & American Life Project shows that twice as many college graduates than high school graduates perform online search on a typical day:

College graduate 66%
Some college 49%
High school graduate 32%

Also differences in income affects the likelihood to use search on a typical day:

$75,000 + 62%
$50,000 – 74,999 56%
$30,000 – 49,999 34%
<$30,000 36%

The question is, do you become educated from searching or do you search because you are educated?

The genders also show different search behaviours:

Men 53%
Women 45%

Do men search more because they get better returns on searches or because they need more information to find their answers?