The Dead Grandmother/Exam Syndrome and the Potential Downfall Of American Society (PDF) — education is dangerous to female extended family members. As can be seen in Table 1, when no exam is imminent the family death rate per 100 students (FDR) is low and is not related to the student’s grade in the class. The effect of an upcoming exam is unambiguous. The mean FDR jumps from 0.054 with no exam, to 0.574 with a mid-term, and to 1.042 with a final, representing increases of 10 fold and 19 fold respectively. (via Hacker News)
Internet: 2012 in Numbers — lots of surprising numbers, with sources. Three that caught my eye: 42.1% – Internet penetration in China; 2.7 billion – Number of likes on Facebook every day; 59% – Share of global mobile data traffic that was video.
2013: The Year Ahead in Mobile (Business Insider) — Mobile is already 1/7 of global Internet traffic and growing its share quickly [...] on pace to top 25% by year end. Interesting prediction that rich people already have devices, so everyone’s working on low-cost units so they can sell to new customers in “growth markets” aka developing world.