BOSTON: Interactive marketing will reach nearly $55 billion, representing almost a quarter of all marketing expenditures by 2014, according to a new report from Forrester Research.

The increase in interactive won't expand advertising budgets but rather come at the expense of traditional advertising as marketers shift dollars to interactive marketing, such as social media, mobile marketing, and search and e-mail marketing and display ads, the analysts found.

Of the 200 marketers surveyed, 60% said they would fund an increase to their interactive ...