There’s an evolving mystery about Facebook: How are we supposed to measure its popularity now? On January 31, Facebook initially spooked investors by disclosing the slowest growth rate of daily users in its history and a 5 percent decline in the amount of time people spent on the social network in the final quarter of 2017. The company’s stock price ...

President Donald Trump talked a lot about coal mining during his campaign, and he has kept talking about it since. “We have ended the war on clean coal,” he declared in his State of the Union address just this week. I’d take issue with the phrase “clean coal” (more on that later), but it is definitely true that the Trump ...

Bloomberg European Central Bank Executive Board member Benoit Coeure urged European governments to push ahead with plans to strengthen monetary union to avoid stretching his institution’s mandate in the next crisis. “Without further reforms, the next crisis may well force the ECB to test the limits of its mandate,” he said in a speech near Ljubljana, Slovenia. “To assume that ...