Ethan Bernstein, associate professor at Harvard Business School, studied how coworkers interacted before and after their company moved to an open office plan. The research shows why open workspaces often fail to foster the collaboration they’re designed for. Workers get good at shutting others out and their interactions can even decline. Bernstein explains how companies can conduct experiments to learn how to achieve the productive interactions they want. With Ben Waber of Humanyze, Bernstein wrote the HBR article "The Truth About Open Offices."