Paid search market shares: Google - 35%, Yahoo! - 31.8%, MSN - 16%

AlwaysOn Network quotes ComScore Networks research on paid search market shares. Google owns 35% of the paid search market and Yahoo with combined Overture, AltaVista and FAST properties owns 31.8%. MSN is currently at 16% of the paid search market, but it recently decided to dump Overture and start its own paid-search program.