joining us to talk about the new workweek, stanford university professor of economics, nicholas bloomhas been studying remote work since before the pandemic made it mainstream, right? nicholas: that's right. almost 20 years. it was quiet until march 2020, then it exploded. kristen: look, i need your expertise. a new survey shows most employers plan to bring workers back to the office in the bay area this month, but not in the old way. what does the new normal look like and what are the permutations? nicholas: right, first thing, only half of bay area employees work from home now. half of the folks are front-line retail, manufacturing, essential service. they have to go in hand have been going in during the pandemic. the half we are talking about are professionals, managers, people working in tech and finance. yes, most of those people will be going back two or three days a week and enjoying the other two or three days at home. kristen: ok. google is asking for three days on-site. tell us why you think most opine that three days is -- people find that three days is ideal? nicholas: hyb