Scarcity hypothesis is the cornerstone of traditional economic theory. However, in the digital era, new products such as Windows, Android, and Wechat have been introduced to the market. Traditional economic theory may not be able to explain various nez economic phenomena in the digital era. This book creatively proposes the concept of limitless supply and then discusses its implications for economy at both macro and micro-levels.It analyses and summarizes the basic features of limitless supply products, and compares the differences and similarities of how limited supply and limitless supply products are manufactured and marketed. The book also provides reasons for why manufacturers of limitless supply products create intangible assets. It argues that the scale of an enterprise producing limitless supply products depends on the number of users, whereas the scale of an enterprise producing limited supply products depends on the production capacity.This book is mainly written to construct a preliminary, simple, yet relatively comprehensive economic theory framework for limitless supply, and to interpret the phenomena and corporate behaviour. It further explores how enterprises providing limitless supply products grow financially. It also proposes the fundamental difference in growth models between enterprises providing limitless supply products and those providing limited supply products. The book also looks at how growth models can achieve fission growth.

This paper uses the term structure of interest rates to explain the variations of stock prices and stock returns. It shows that interest rates have an important impact on stock returns, especially at long horizons. The hypothesis that expected stock returns move one-for-one with ex ante interest rates, which has been rejected strongly in other studies using short horizon data, is supported by long horizon data. The paper proposes, for the first time, a single measure---the present value of forward interest rates---to summarize the information of the term structure that is useful in characterizing the comovements of the equity market and the bond market, and finds that such a single measure explains a significant part of variation in dividend-price ratios. The paper also suggests that the high volatility of the stock market is related to the high volatility of long-term bond yields and may be accounted for by changing forecasts of discount rates. The findings of this paper are quite different from the typical findings of the previous work and may provide a reasonable economic explanation for the predictability of long-horizon stock returns.