In a free market, individuals may band together cooperatively, pooling their assets into a corporation. Typically, they are allotted "shares" (aliquot portions) of the corporation in proportion to the assets that they contribute. The corporation's assets are thus owned by these stockholders, although they may entrust day-to-day management of those assets to other individuals. Each stockholder shares in any proceeds from the venture, usually in proportion to the number of shares owned, which may be traded in the market. The corporation's assets may include land and capital goods—the latter including not only such obvious items as factories and machinery, but also inventory, IOUs for future services, and such intangibles as organizational structure, good will, and investment in the training of employees. Labor as such, however, exists only during the brief moment when it is being expended and thus cannot be owned in advance. Consequently, we shall not consider labor to be included among the holdings of stockholders.