Eichengreen (2015, Hall of Mirrors):
In the 1920s it was said that the world had entered a “New Era” of economic stability with the establishment of the Federal Reserve System and independent central banks in other countries. ...
The 1920s were known as the “New Era,” capturing the idea that the country had entered a new age not only of faster productivity growth but also of greater economic and financial stability. Shades of the “Great Moderation,” the supposed diminution of the business cycle in the lead-up to the 2008–09 crisis.
I had never heard of this "New Era" notion before. I know of Irving Fisher's infamous "permanently high plateau" quote, but I do not know of anything similar to the triumphalist "Great Moderation" messages sent out by (some) economists before 2008.
(I wonder if Eichengreen is perhaps exaggerating this in order to craft stronger parallels between the Great Depression and Great Recession.)
So, were there any contemporary economists (or other observers) who considered the 1920s a "New Era" of greater growth and stability?