A dorning urban intersections and rising high at countryside interstate exits, the gas-station sign announces the mood of the consumer economy. For the past several weeks, the economic ramifications of the Iran war have been more or less universally represented through photographs and videos of them. It’s easy to see why: The price of gasoline is always displayed on the sign, in huge numbers that overwhelm the rest of the scene. That design, which is unlike anything else in the economy, makes