" Beyond grief lay Coolidge’s accurate perception that in the 1920s Mellon’s and his own policies were yielding the good that the men had predicted. Today we estimate that the highest level of unemployment under President Coolidge had been 5 percent in the year he was elected. From there it dropped to 3.2 percent in 1925 and then into the twos and ones. Citizens could afford all the new products. There was nothing bubbly about the potential for productivity gains. By the end of 1925 Ford’s peak production was 8,500 a day, up substantially from the 6,000 from a few years before. Overall in the years from 1923 to 1929 car production would double. "

― Amity Shlaes , The Forgotten Man: A New History of the Great Depression