More pizza equals better employees.

FOX's Rich Denison explains:

Pizza might be a key to improved productivity at work...

A new study shows employees offered free pizza accomplished more and worked harder. In David Ariely's new book "Payoff, The Hidden Logic That Shapes Our Motivations."

He conducted a study of workers in Israel who made computer chips. One group was promised a cash bonus for hitting a production goal, another given encouraging texts, and a third group offered free pizza. A fourth got nothing.

The study shows the pizza promise pushed productivity higher, beating out cash and compliments. So tell the boss, extra cheese.

Rich Denison, FOX News.