The Theory of Interest as Determined by Impatience to Spend Income and Opportunity to Invest It is a book written by Irving Fisher, an American economist. The book is a detailed analysis of the economic concept of interest rates and how they are determined by various factors. Fisher argues that interest rates are primarily determined by two factors: impatience to spend income and opportunity to invest it. He explains how these two factors interact with each other to determine the interest rate in a given economy.The book is divided into several chapters, each covering a different aspect of the theory of interest. Fisher begins by defining what interest is and why it exists in the economy. He then goes on to explain how interest rates are determined by the supply and demand for loanable funds. Fisher also explores the role of inflation and risk in determining interest rates.The book is written in a clear and concise style, making it accessible to both economists and non-economists alike. It is a seminal work in the field of economics and has had a significant impact on the development of economic theory. The Theory of Interest as Determined by Impatience to Spend Income and Opportunity to Invest It is a must-read for anyone interested in understanding the complex workings of the economy.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.