Yeah. I think they’ve worked pretty well in the past. Others have mentioned the USSR already, but the UK was pretty quick to adopt central planning for farmers when they needed to massively boost food production during the war. I don’t usually link to videos, but there’s a great edutainment program that covers it in a lot of detail. I highly recommend it! The farmers initially didn’t like it, but by the end of the war, they definitely had an appreciation for it, and you can’t argue with the results.

There’s also been the argument that Walmart is one big centrally planned economy in and of itself. Sears on the other hand infamously tried to implement a free market internally.

EDIT: Damnit, I took too long to write this and all of this has now been covered. Oh well, I like my links.

EDIT2: Damnit, his instance blocks us anyway.