It may have existed - but it wouldn't have mattered since the US government essentially controlled the production of critical industry and companies through the

It may have existed - but it wouldn't have mattered since the US government essentially controlled the production of critical industry and companies through the OWM, under threat of price controls, seizures, and establishing government corporations. Not quite the iron-grip that less democratic nations had on their economies during war-time, but not what you would call a free-market economy nowadays.