Why words are the new numbers

Every day, we express ourselves in 500 million tweets and 64 billion WhatsApp messages. We perform more than 250 million searches on eBay. On Facebook, 864 million of us log in to post status updates, comment on news stories, and share videos.

The secrets of shopping

Around the world, billions of sales transactions every month, down to a can of Coca-Cola from a local store, are recorded in some way by Nielsen, the measurement and information firm that has been gathering data from retailers and consumers for 90 years.