According to Standard Media Index, radio advertising spending increased 22% in February, compared to February 2015. That increase was higher than the increase in digital media’s performance, which was up 21%. By the way, newspaper spending was down 17%.
Standard Media Index comes from outside the radio arena and provides the only clear picture on how ad dollars are being spent — from television to digital, sourcing expenditure data directly from the leading global media buying firms. Data that covers 75% of all agency spend and is available in 15 global markets. Actual ad spend. Not estimates.
http://radioink.com/2016/03/17/report-radio-ad-spending-increased-22-in-february/