It's worth exploring and discussing, and if academia wants to get involved, their contributions are welcome. I just think that they shouldn't be surprised when the lede is about "Princeton researchers" by mass media.
> I think there is general consensus that in North America we have likely reached peak Facebook engagement
I disagree. There are signs that US teens are decreasing engagement or maybe not even registering: http://istrategylabs.com/2014/01/3-million-teens-leave-faceb.... However, other age groups are apparently doing well, and there's no sign that 80% of users will leave by 2017.
On the whole, they continue to grow. The question is whether the teens are an early indicator that will apply to all demos/geos and that they will all decline, or if there's maturation in the product and that it better fits an older demo and the teens will grow into FB in later years. Or maybe something else.
> I think there is general consensus that in North America we have likely reached peak Facebook engagement
I disagree. There are signs that US teens are decreasing engagement or maybe not even registering: http://istrategylabs.com/2014/01/3-million-teens-leave-faceb.... However, other age groups are apparently doing well, and there's no sign that 80% of users will leave by 2017.
On the whole, they continue to grow. The question is whether the teens are an early indicator that will apply to all demos/geos and that they will all decline, or if there's maturation in the product and that it better fits an older demo and the teens will grow into FB in later years. Or maybe something else.