This creation of tangible wealth out of intangible assets is seen perhaps at its neatest in the enhancement of land values by the endeavors of interested parties. Real estate is, of course, a tangible asset of the most authentic tangibility, and it is an asset to the amount of its value, which is determined, say, by the figures at which the real estate in question is currently bought and sold. This is the current value of the real estate, and therefore its current actual magnitude as a tangible asset. The value of the real estate might also be computed by capitalising its rental value; but, where the current market value does not coincide with the capitalised rental value, the former must, according to business conceptions, be accepted as the actual value. In many parts of this country, perhaps in most, but particularly in the Western States and in the neighborhood of flourishing towns, these two methods of rating the pecuniary magnitude of real estate will habitually not coincide. Due allowance, often very considerable, being made, the capitalised rental value of the land may be taken as measuring its current serviceability as an item of material equipment; while the amount by which the market value of the land exceeds its capitalised rental value may be taken as the product, the tangible residue, of an intangible asset of the nature of good-will, turned to account, or "productively employed," in behalf of this parcel of land.[8] Some of the lands of California may be taken as a very good, though perhaps not an extreme, example of such a creation of real estate by spiritual instrumentalities. It is probably well within the mark to say that some of these lands owe not more than one-half their current market value to their current serviceability as an instrument of production or use. The excess may be attributable to illusions touching the chances of future sale, to anticipation of a prospective enhanced usefulness, and the like; but all these are immaterial factors, of the nature of good-will. Like other assets, these lands are capitalised on the basis of the anticipated income from them, part of which income is anticipated from profitable sales to persons who, it is hoped, will be persuaded to take a very sanguine view of the land situation, while part of it may be due to over-sanguine anticipations of usefulness generated by the advertising matter and the efforts of the land agents directed to what is called "developing the country."