Before going into the matter of intangible assets, it is necessary to speak further of the consequences which investment--and hence capitalisation--has for the use and serviceability of (material) capital goods. It has commonly been assumed by economists, without much scrutiny, that the gains which accrue from invested wealth are derived from and (roughly) measured by the productivity of the industrial process in which the items of wealth so invested are employed, productivity being counted in some terms of material serviceability to the community, conduciveness to the livelihood, comfort, or consumptive needs of the community. In the course of the present inquiry it has appeared that the gainfulness of such invested wealth (tangible assets) is due to a more or less extensive engrossing of the community's industrial efficiency. The aggregate gains of the aggregate material capital accrue from the community's industrial activity, and bear some relation to the productive capacity of the industrial traffic so engrossed. But it will be noted that there is no warrant in the analysis of these phenomena as here set forth for alleging that the gains of investment bear a relation of equality or proportion to the material serviceability of the capital goods, as rated in terms of effectual usefulness to the community. Given capital goods, tangible assets, may owe their pecuniary serviceability to their owner, and so their value, to other things than their serviceability to the community; although the gains of investment in the aggregate are drawn from the aggregate material productivity of the community's industry.