Assorted Links

1. The world's busiest airline routes (Rio-São Paulo ranks in second)
   
   
2. A list of R packages, by popularity
   
   
3. What is behind the differences in school performance? PISA
   
   
4. What are the big trends shaping transport? (via D. Levinson)
   
   
5. The relationship between fertility rates and female education
   
   
6. A map showing recent protests in Brazil (via Ricardo Dagnino)
   
   
7. 22 Maps That Show How Americans Speak English Totally Differently From Each Other
   
   
8. Mapping Twitter demographics