This excellent book is titled Hoover: An Extraordinary Life in Extraordinary Times. Here is one good bit:
Knowing that he could not manage what he could not measure, Hooover made Commerce botha producer and a clearinghouse of relevant information on the U.S. economy. Once again, he turned to like-minded experts, this time primarily in the academic community. Hoover announced the Advisory Committee on Statistics and recruited to it such luminaries as Edwin Gay, the first dean of the new Harvard Business School; Edwin Seligman, the Columbia economist and a founder and past president of the American Economic Association; and Cornell’s Walter Willco, a past president of the American Statistical Association and a former co-director of the U.S. Census. Another eminence, Julius Klein, the Harvard economist and historian, was recruited to head Hoover’s Bureau of Foreign and Domestic Commerce and allowed to increase its budget by a factor and six and its personnel by a factor of five. In short time, these and other initiatives turned Commerce into a vast reservoir of information on every aspect of economic life from steel to motion pictures…
The scope of Hoover’s activities in Commerce was stupendous. Singlehandedly doing enough work for an entire cabinet, he was said to be “Secretary of Commerce and Undersecretary of Everything Else.”
Recommended, note that Hoover was in fact one of the most qualified men ever to have become president.