It is the business of science to predict. An exact science like astromy can usually make very accurate predictions indeed. A chemist makes a precise prediction every time he writes a formula. The nuclear physicist advertised to the world, in the atomic bomb, how man can deal with entities so small that they are completely beyond the realm of sense perception, yet make predictions astonishing in their accuracy and significance. Ecomics is w reaching a point where it can hope also to make rather accurate predictions, within limits which this study will explain. Complete with more than 150 grafts and charts. Wilder Publications is a green publisher. All of our books are printed to order. This reduces waste and helps us keep prices low while greatly reducing our impact on the environment.