If the American public stays home en masse even after public officials lift stay-at-home orders, the ‘re-opened’ economy will look nearly as morose as the current one. If we reopen it, will they come? That paraphrase of the signature line from “Field of Dreams” illustrates a dilemma facing the Trump administration, along with state and local leaders, as they contemplate when and how to reopen elements of the economy shut down by the coronavirus pandemic.Just because the Trump administration gives word that individuals and businesses can reopen doesn’t mean that most, or even any, of them will do so.A dozen...