From BBC News:
Driving the spurt from $2.3tn (£1.5tn) to $4.2tn (£2.7tn) will be the rapid rise of mobile internet access.
The study, commissioned by web giant Google, assumes that in four years 3bn people will be using the internet, or nearly 50% of the world’s population.
The research suggests that the UK is one of the most advanced e-commerce economies.
Another good reason to tread carefully when it comes to devising regulations for this interconnected and dynamic market.