For if insufficient spending is the culprit, then how is it that retail sales are the last and the least to fall in any depression, and that depression really hits such industries as machine tools, capital equipment, construction, and raw materials? Conversely, it is these industries that really take off in the inflationary boom phases of the business cycle, and not those businesses serving the consumer. An adequate theory of the business cycle, then, must also explain the far greater intensity of booms and busts in the non-consumer goods, or “producers’ goods,” industries.
