> stated purpose is generally to reduce prices seen by consumers, or to subsidize producers of some particular good/service
I thought I gave examples that fell outside of this?
* Wartime/Emergency: stated purpose is to shift supply toward military/medical uses. Shortages and black markets are acceptable negative side effects.
* Energy: protect citizens from gouging in time of crisis. Lack of price controls did not prevent blackouts to Texans in the US last year. It did cause many folks to be saddled with insane bills.
You can also implement rationing to further mitigate imbalances. So price may be low, but you can only buy 1 per day, or something like that.