This does happen, but in the US (and most(?) countries) we don't have command economies. Consequently, this sort of model-based approach to economics (logistics) is done by businesses. The big, successful ones are very good at it. Walmart knows how much of what good to send to what region on what day. They've been collecting and correlating data for decades now.
Where it's done by the government it's applied at the level of bonds and currency production and such. More abstract levels than directing purchase or production of specific items (generally, more direct intervention does still happen of course, but usually masked).
Germany doesn't have a command economy either, it's a combination of government incentives, private enterprise, and (semi-)public utilities all going in this direction.
Where it's done by the government it's applied at the level of bonds and currency production and such. More abstract levels than directing purchase or production of specific items (generally, more direct intervention does still happen of course, but usually masked).