vii Preface opinions held by others, whether or not they agree with my own conclusions, past or present, in the hope that the reader will in this way have before him all the chief points of view that it is practicable to assemble. To publish the book now may seem audacious, but there is advantage in writing tentative conclusions while impressions and memories are still fresh. Someone has said that the “true perspective’ of the historian really means he waits until everyone who could contradict him has died! It is, of course, too early to reach any absolutely sure conclusions; nothing is more difficult to analyze and understand thoroughly than a panic; especially, a panic so great and so peculiar as that which has visited the American stock market. It stands unique in the annals of finance. But even if some of the views here expressed should later be found in need of revision, I trust this book will have served its pur- pose by contributing somewhat toward a better even- tual understanding of the problem. The ordinary explanations now finding the greatest currency seem to me far too simple and naive. IrviNG FISHER. Yale University, December 15, 1929.