The study: Nicholas Bloom and graduate student James Liang, who is also a cofounder of the Chinese travel website Ctrip, gave the staff at Ctrip's call center the opportunity to volunteer to work from home for nine months. Half the volunteers were allowed to telecommute; the rest remained in the office as a control group. Survey responses and performance data collected at the conclusion of the study revealed that, in comparison with the employees who came into the office, the at-home workers were not only happier and less likely to quit but also more productive.