The firm asked more than 400 marketers to rate a variety of devices for their ability to generate leads.
Thirty percent of marketers chose research reports as the most effective device.
Twenty-eight percent chose Webinars and twenty-six percent chose white papers.
A research report can act like a prospect-magnet, provided it asks the right questions and answers them in an honest way, according to the firm's blog.
Reports that don't focus on customers' "common pain points" or that merely recycle your opinions won't woo prospects, the firm says.