US mobile ad spending to soar, says eMarketer

Research firm eMarketer expects spending on mobile advertisements to hit nearly $9.6 billion in the U.S. this year, up from $4.4 billion in 2012 and from less than $1.6 billion in 2011 as Facebook and Google barrel ahead.

New Facebook, Twitter ads boost mobile revenues

New ad products from Facebook and Twitter have given US mobile advertising a boost, bringing revenues for the sector to more than $4 billion this year, a research firm said Monday.

Mobile ad spending up 62%, US tops Japan: survey

Mobile online advertising spending is expected to jump 62 percent worldwide in 2012, with the United States overtaking Japan as the top market, a research firm said Wednesday.