The Economist asked Cameron Marlow, the “in-house sociologist” at Facebook, to crunch some numbers. Dr Marlow found that the average number of “friends” in a Facebook network is 120, consistent with Dr Dunbar’s hypothesis [that individual human being’s social networks are limited to about 150], and that women tend to have somewhat more than men. . . .
What also struck Dr Marlow, however, was that the number of people on an individual’s friend list with whom he (or she) frequently interacts is remarkably small and stable. The more “active” or intimate the interaction, the smaller and more stable the group.
Thus an average man—one with 120 friends—generally responds to the postings of only seven of those friends by leaving comments on the posting individual’s photos, status messages or “wall”. An average woman is slightly more sociable, responding to ten. When it comes to two-way communication such as e-mails or chats, the average man interacts with only four people and the average woman with six. Among those Facebook users with 500 friends, these numbers are somewhat higher, but not hugely so. Men leave comments for 17 friends, women for 26. Men communicate with ten, women with 16.
What mainly goes up, therefore, is not the core network but the number of casual contacts that people track more passively. This corroborates Dr Marsden’s ideas about core networks, since even those Facebook users with the most friends communicate only with a relatively small number of them.
Six of my nieces will head off to college over the next several years. Some have been Facebooking since middle school. Even as they leave home, then, they will hang onto that “home” button. That’s hard for me to imagine. As a survivor of the postage-stamp era, college was my big chance to doff the roles in my family and community that I had outgrown, to reinvent myself, to get busy with the embarrassing, exciting, muddy, wonderful work of creating an adult identity. Can you really do that with your 450 closest friends watching, all tweeting to affirm ad nauseam your present self? The cultural icons of my girlhood were Mary Richards of “The Mary Tyler Moore Show” and Ann Marie of “That Girl,” both redoubtably trying to make it on their own. Following their lead, I swaggered off to college (where I knew no one) without looking back; then to New York City (where I knew no one) and San Francisco (ditto), refining my adult self with each jump. Certainly, I kept in touch with a few true old friends, but no one else — thank goodness! — witnessed the many and spectacular metaphoric pratfalls I took on the way to figuring out what and whom I wanted to be. Even now, time bends when I open Facebook: it’s as if I’m simultaneously a journalist/wife/mother in Berkeley and the goofy girl I left behind in Minneapolis. Could I have become the former if I had remained perpetually tethered to the latter?
Our idea is that Coca-Cola could use their distribution channels (which are amazing in developing countries) to distribute rehydration salts to the people that need them desperately. Maybe by dedicating one compartment in every 10 crates as ‘the life saving’ compartment?