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Laszlo Bock, the former head of human resources at Google, has investigated the optimal amount of “work from home” time.45 He found it to be one and a half days a week. With this combination, employees both have time to connect and build bonds with each other and also time on their own to do deeper, undistracted work.
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Noreena Hertz (The Lonely Century: How to Restore Human Connection in a World That's Pulling Apart)