Nearly half of Internet users have mobile access

White paper offers advice on integrating mobile into marketing campaigns

The percentage of Americans who use the Internet and who can also access it on the run using smart phones and other mobile devices is expected to grow from 39 percent in 2010 to 59 percent in 2014, according to a new Yahoo Inc. white paper.

This year, more than 126 million Americans — or 47 percent of the total online population — are expected to have mobile Internet access, Yahoo said, citing research from IDC Digital Marketplace.