ABSTRACT
The most important types of firms is the conglomerate megacorp - a megacorp that is a member of more than one industry. Such firms are becoming increasingly more common. Polypoly, within the framework of the oligopolistic model developed previously, is perhaps best described as the type of industry in which, due solely to market forces, the corporate levy is restricted in the long run to a depreciation allowance alone. With additional net revenue desired only because it immediately and directly increases the personal income of the owner-entrepreneurs and with marginal costs varying with the level of output, the price situation resembles the conventional monopolistic model. The case of regulated monopoly is perhaps more interesting, and not just for the reason that within the American economy it is far more prevalent than the unregulated variant. Yet, paradoxically, the polypolistic model posits the eventual elimination of any such residual income.
