Science A/B Testing Goes Mainstream: Used By Stores, Campaigns, Even Schools 5:47am December 29, 2015 by Steve Henn Business Research News Share URL copied to clipboard! Copyright 2015 NPR. To see more, visit NPR. 300x250 Ad More Morning Edition Economy Shoppers are playing a large part in the continued growth of the U.S. economy Music & Culture Canadian rapper Drake enlisted Tupac Shakur in his new beef 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate