Studies of digital usage are easy to find, but we have found none that offer these kinds of answers.

FORBES: Digital What?

"We have found none of them yet, " Mr. Mollik said.

WSJ: Ferry With 100 Aboard Capsizes in Bangladesh

Except for Santa Clara, none of the richest counties we found are in cities that contain some of the country's most expensive homes, which only a select few can afford.

FORBES: America's Richest Counties