Wu Haishan was at Princeton studying how schools of fish swim together when the crowd behavior of a much bigger group grabbed his attention: his 1.35 billion fellow Chinese. It was Lunar New Year back home in 2014, and Baidu, operator of the country's biggest search engine, had created an animation showing all the trips the Chinese had made during the holiday, which demographers say is the largest annual human migration anywhere. Wu, who'd seen the animation, soon joined Baidu as a data scientist in Beijing. With the company's vast amounts of user location information, he's come up with ingenious ways to measure economic activity.

Say goodbye to the era of free trade.

The U.K. is making a clean split from the European Union. How will its economy and trading relationships fare in a post-Brexit world?

Africa wants to become fertile ground for new energy investment - investments that would help electrify parts of the continent and make it ripe for new businesses and new jobs, the African Development Bank says.

Rather than highlighting how far India's economy has come under Prime Minister Narendra Modi's pro-growth administration, a new gross domestic product report underscores just how much there is to lose from his shock clampdown on cash.