156 The Stock Market Crash—dAnd After

business problems, of fitting men and machines together
 in the best possible ways, and of codrdinating
sales and financing with the programs of production,
that is revolutionizing the economies of business and
rapidly enhancing the values of business securities.
Under the influence of the industrial managers,
modern industry saves much waste. This is a basic
reason for the long bull market of 1922-1929.