A group of researchers at Microsoft has been crunching data about how work habits have shifted over the past few months, using all sorts of anonymized data from the company’s own workforce. It turns out, as you may have already experienced, there is a lot more work activity through the lunch hour than there used to be. And it’s not just meal time getting squeezed. Work activity, as measured by emails, instant messages, and meetings, has increased after 6 p.m. and on weekends. Overall, people are working four more hours per week on average.