London 2012 has two one-eyed official mascots, Wenlock and Mandeville, but Ennis has been the real mascot of the games for the host country -- and could probably outsell the cyclops if a plush-toy version of her went to market.

WSJ: Social Media

With a population of 184 million, Brazil's potential internal market is large, and the country has attracted a host of multinational companies.

FORBES: International Investing