America's first celebrated ecomist-developer of the Fisher equation, the Fisher hypothesis, and the Fisher separation theorem-offers here a rational foundation for the most fundamental of concepts behind the modern ecomics: capital and income. This 1906 textbooks explores such ideas as. . the difference between wealth and property rights . why one bankruptcy leads to ather . the difficulties of defining income . the premium and price concepts of interest . risk in the ecomic arena . and much more.