What does that mean? As hicks income concept did not specify what is called "equal wealth", and thus the income concept formed the basis of many debates concept, and the theory of accounting earnings, especially the capital preservation theory has a great influence. In accounting, people used to call "maintaining the same level of affluence" as capital preservation. How to create a more inclusive and fairer society for different creators? A study from PBS shows that diversity helps develop better products and systems. So why is yu 'e bao falling steadily?