Context collapse and context restoration

Facebook has a problem. Its members aren’t sharing as much as they used to. At least they’re not sharing first-hand the way they used to. Instead of posting notices about what they’re doing or thinking, or where theyare, or whom they’re hanging out with, they’re just recyclingsecond-handstuff — news stories, songs, other people’s photos or tweets, YouTube videos, etc. Thenature of what they share on the network is changingfrom the personal to the impersonal, from the informal to the formal,...