The emergence and development of econometrics originates from the long-standing waste problem in economic and social life. The important value of econometrics lies in a new understanding of saving, a deep understanding of the causes of waste, finding out the laws therein, criticizing wrong ideas, and proposing ways to reduce waste and achieve conservation.

Saving is an old and often new topic, an abstract and concrete concept, and a profound and vivid wisdom. Compared with the traditional sense of frugality, frugality and diligence, the new era of frugality has deeper meaning, more levels, wider fields, higher requirements and greater significance, which is a supplement and development to the traditional concept of frugality.

The law of saving is divided into the general law of saving and the special law of saving. The general law of saving is that because of the contradiction between the limited resources and the unlimited needs of people, human beings will inevitably engage in economic activities according to the principle of saving. The law of saving plays different roles in the fields of direct production, circulation, distribution and consumption, and constitutes a special law of saving. In the field of direct production, the special form of saving law is the saving of labor time per unit product. In the field of circulation, the function of the law of saving is to sell as soon as possible.

So far, waste, as an economic phenomenon, is a common problem in human society. This is a fact as well as an objective condition for studying economy and waste. The characteristics of waste include: "certain universality", "irrelevance", "artificiality", "obstinacy", "shortage" and "governability". These characteristics still exist today, such as food waste, catering waste and other problems are more prominent practical problems. The reasons are complex, including both the old ones formed in history and the new ones emerging in reality; There are both human factors and objective factors, at least including concepts, systems, systems, policies, etc. In terms of concept, there are wrong concepts such as the antithesis between saving and consumption, the antithesis between saving and economic development, and the theory that money can be wasted. In terms of system, there is no special legal system to restrict waste. In terms of system, the fiscal and tax system is still insufficient for saving incentives. In terms of policy, the policy of encouraging economy needs to be strengthened.

Deeply understand the importance of saving. The contradiction between the infinity of human needs and the finiteness of resources is the eternal contradiction of human society, which determines that human beings must always save. In a society with relatively abundant material and spirit, saving is no longer forced saving, but a kind of wisdom, a philosophy of life, and a rational choice under the conditions of abundant material and cultural life. It is reflected in the choice of using when it is used, and not using when it is not used. It is a kind of active, positive, upward, and intelligent choice. Human beings must clearly recognize this objective and eternal contradiction, so as to double cherish resources and take the road of sustainable development.

Explore ways to achieve savings. To achieve economy, we need to work together in many aspects, such as economic development mode, ideology, system and mechanism, and legal environment. In brief, in terms of economy, it is necessary to establish a system, system and mechanism for overall conservation and efficient use of resources, adjust the economic cycle, and achieve resource conservation through institutional and technological innovation. In the social aspect, we must pay attention to the cultivation of people's concept of saving, form a glorious atmosphere of saving in the whole society, and make the scope and extent of waste smaller and smaller.

We will comprehensively strengthen conservation education. It is necessary to integrate resource conservation education into various education and technical training systems at all levels, formulate training plans, and strengthen conservation education. At the same time, save as an important part of establishing a good family style.

Deepen the study of economizing theory. The existing economic theory is not enough to study the problem of saving, and it needs to be further studied. It is suggested to study the problem of economy from the perspective of close combination of qualitative and quantitative analysis, and to apply the category of economy to all sectors of economics.

(The author is an economist)