You’ve heard the criticism. Too many American corporate managers are addicted to “short-termism.” They postpone investments and other costs, sacrificing future performance for present profitability. Either they’re pressured by “activist investors” or want to inflate the value of their stock options. If true, it could help explain the economy’s lackluster performance. Now, a new study asserts that it is …

  At this point last year, Twitter was a company that had a hard time attracting new people to surf and tweet, but it was quite skilled at generating ad dollars from its die-hard users. Now Twitter’s problem has reversed. It’s still a mess of a company, but in a fresh way. People are using Twitter more, but advertisers are …

  The news from Afghanistan is as relentless as it depressing: six aid workers murdered by IS, at least 20 dead from a suicide bombing at the Supreme Court, more territory lost to the Taliban, more opium growing in the fields. Maybe that explains Donald Trump’s silence on the war since becoming president. But it does not excuse it. The …