If you’re looking for answers to perplexing questions—like what’s the future of Social Security, will China dominate the world, or how many apples can we grow and sell in the future—the first approach is do the math. The answers, interestingly, are that Social Security will get financial support from a huge new generation, China will weaken rapidly in the near future, and apple sales will be vigorous and rising. And, by the way, the future of ­Walmart is dismal. Apple industry leaders were captivated as they listened to a presentation by demographer Kenneth Gronbach during the U.S. Apple Association’s Outlook […]