Amazon.com, Berkshire Hathaway and JPMorgan, with a combined market capitalization of about $2.5trln, brought some useful weapons to the fight against healthcare inefficiency
Super-fast computer programs and massive databases have had a profound impact on professional chess in recent years. But, despite the threat of cheating, the game is currently in remarkable creative and economic health - not least because it is fantastically suited to the online world
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