The Justice Department’s new head of antitrust enforcement, Makan Delrahim, is getting plenty of grief for his surprise decision to challenge merger of AT&T and Time Warner. He’s been accused of stretching law “beyond the breaking point,” and of helping President Donald Trump act on his long-running grudge against Time Warner’s flagship news network, CNN. Actually, Justice is to be …

The idea that prices in financial markets reflect all available information — also known as the efficient markets hypothesis — has many variations: Some adherents think the process is immediate and precise, while others think it’s much messier, with prices often missing true value by a significant margin. New research suggests that the latter version fits the data better — …

The great Chinese environmental cleanup, now in full swing, is shifting the corporate landscape in unexpected ways and even stoking inflationary pressure that may soon be felt in supply chains worldwide. As President Xi Jinping’s government intensifies the fight against the country’s world-class pollution problem, companies are scrambling to adapt to tighter regulation while investing in cleaner energy. In industries …