Wal-Mart employee Dayngel Fernandez stocks shelves in the produce department of a Miami store in February. Activists say the company's recent corporate policy changes don't address systemic labor and environmental problems.
Joe Raedle/Getty Images
A woman pushes a cart at a Costco store in Hackensack, N.J., in 2013. Big-box stores are effective delivery devices for fattening foods, economists argue in a new study.
Ron Antonelli/Bloomberg via Getty Images
A customer makes a purchase using Apple Pay on her iPhone 6 at a Walgreens store in Times Square last Monday. The mobile payment service has now been blocked by CVS and Rite Aid.
John Minchillo/AP Images for MasterCard