The analysis of economics is not limited to certain fields. As long as there are human social activities, there is economy, and there is the problem of rational allocation of resources, so economic analysis is needed. Although I also want to seek fame, I lack practical experience and don't want to be too fraudulent, so I think of sociology, which may be a new field, including the analysis of social activities of individuals and groups, such as family ties. Whether people admit it or not, parents' parenting can actually be analyzed as a simple investment. Limited by space, this paper only analyzes the love of college students, and will analyze it from supply and demand, input and output, market economy and other aspects. I. Definition of Economic Environment Generally, college students have reached or exceeded the age of 18, and have been able to fully bear the corresponding civil and criminal responsibilities in the legal sense. At the same time, because of their relative immaturity, their behavior at this stage is often "irrational", that is, they are generally impulsive and blind, including love. In the research object of love, the particularity of the research object lies in that every participant is a supplier and consumer of the market. According to the principle of scarcity of resources and the actual situation of universities, we assume that college girls are the supply side (S) and college boys are the demand side (D)[ Note: this study does not include abnormal teacher-student love and other categories, and is limited to ordinary male and female students with equal status in the market]. It is obvious here that S<d, according to the general actual situation of universities, has fewer female students than male students, and has a wider range of coverage. There are some exceptions, such as some foreign language colleges and normal colleges and professional women's colleges, but it does not affect the overall performance. In addition, both parties in love can be regarded as market subjects, coexisting with individual and other lovers. Due to the complexity of sociology and the limitation of personal learning ability, we can't simplify all the processes and participants clearly put forward simplified models for the time being, just like in general economic analysis, there is only one buyer and one seller. Although our research belongs to economic analysis, it cannot be limited to economic analysis. College students have begun to set foot in society, and their choice of love is bound to be influenced by society. Therefore, these factors are regarded as weighted average index in the analysis. Most college students still rely on family support economically and cannot achieve economic autonomy by self-sufficiency. For some people, even the supplier assumed in this paper, love is not as effective as students' main business study. As a demander, love is a luxury. Whether the family will provide special financial support for this depends on the family's economic ability and parents' investment considerations. The investment of parents (guardians) belonging to the family is not within the scope of this analysis and will not be considered too much. Maybe some of them are paradoxes. The economic subject has no economic autonomy, and the object of economic analysis does not have typical economic characteristics, but it conforms to the objective reality. Second, love is a game. Love is a game. There are usually more than two players. The result of this game is rarely without losers. Unless there are only two opponents in a love game, it is possible to reach Nash equilibrium. In more cases, love games are often a win-win situation of losing or losing more. College students' love is more prominent. Once college students decide to fall in love, it means the beginning of choice. An unofficial survey on why college students fall in love shows that most people who fall in love do not really yearn for sacred love, but contain various realistic and complicated factors, of which the two most important factors are the emptiness of college life and the demand for physical sexuality, which may also explain why cohabitation is so popular in today's society, because the behavior of senior intellectuals is generally easy to be accepted and imitated by people. The equal status of the supply and demand sides is due to the scarcity of supply resources, which leads to the competition of the demand side and the situation of the same game between the supply and demand sides. The imbalance between men and women is a potential market premise, which indicates that "men may be single no matter how good they are, and women may get married no matter how dirty they are". Therefore, men and women are generally at a relative disadvantage, and men and men are often cruel. We don't consider the situation that some boys are attracted to girls because they play well, but this kind of thing is becoming less and less, because people's behavior is becoming more and more rational. Although the supply side is a scarce resource, girls may still become the demand side due to different personal preferences. "Men chase women like flowers, women chase men like shrimp", and girls still have certain advantages in the game. Love games used to have the advantage of pioneers, that is, preconceived ideas. Now with the change of people's ideas, the situation is slowly changing. Although the pioneers have certain advantages, they are no longer so obvious and cannot play any decisive role. Let's assume that Y and X are lovers, who are preparing or have already started to fall in love. At this time, there is no forced constraint between them, and love follows the principle of freedom and voluntariness. The two forms a market, the two sides are the supply and demand sides, and the market game is a one-on-one game. Y and X face more than one game at the same time, but the first thing they have to do is to stop market entrants (assuming that they really love each other for whatever purpose), which requires mutual commitment and threats to potential market entrants; Then the two-person game generally presents Nash equilibrium, which is unstable to some extent due to the threat of potential market entrants. Love games may never reach equilibrium. Most students are just out of practical needs and do not intend to find a balance. They just regard their growth investment as a love investment without any economic foundation. Apart from a little effect on eliminating the so-called emptiness and depression in universities, they can't have any obvious or potential benefits, only greater emptiness or later regret. The rational man hypothesis is not as applicable as the economic man hypothesis. Three. Immature system transplantation The relevant state departments officially issued a notice, and the new university management regulations were implemented from September 1 2005, beginning to recognize that college students enjoy the same rights as ordinary citizens. What caused some repercussions and controversies was the marriage of college students. In fact, there is no need to argue at all. Love is not equal to marriage, and marriage is not equal to love. Marriage can produce love, but love does not necessarily produce marriage. Law can restrain marriage, but it cannot control love. The love foundation of college students is quite fragile, and the only thing that can deceive themselves and others is language communication. The reason why a phenomenon is inappropriate is largely because the system design is unreasonable. The emergence and perfection of institutional economics is only a matter of nearly a century, and quite a few contents are still controversial. It is difficult to say whether it is correct when using institutional economics analysis tools. There seems to be no love system analysis suitable for college students. According to the origin of university and people's general understanding of university, we should not make an economic analysis of college students' love. The difference of traditional ideas has caused the blank of this study. Today, it is difficult for anyone to fully accept all kinds of behaviors, including human beings, and measure them by money and votes. However, no one can deny that with the growth and reproduction of human beings from generation to generation, the system has become increasingly rich and eventually evolved into a currency voting system with money as everything. Love is not detached from things, it is the most realistic and can be escaped, but human animal possessiveness is the deterioration of love. Our reference materials are few, and the historical evolution materials are quite scarce, and the research of other systems is not suitable for the study of human behavior in sociology. In particular, college students, as representatives of human high IQ, are a special group, and the research on system transplantation is not mature. The analysis of college students' love has both social commonness and its own characteristics. Fourth, the selected market equilibrium, as a market, must have a short-term equilibrium point even if it is impossible to be at a long-term equilibrium point, otherwise it will not form a market and will not clear the market. Now, in fact, many people have already started to fall in love in high school or even junior high school. We don't regard it as love for the time being, because age and physical and mental development are not perfect. Even if some people have seen some pornography, their desires will not and cannot bear the corresponding love responsibility. University is the watershed between hazy love and true love, and the original hazy love is rarely killed by distance. Even if there is love in junior high school and senior high school, love can still be spread in both places in the early days of college. People pursue realistic interests rather than empty promises, just as it is difficult for two prisoners in the prisoner's dilemma to attack and defend each other. I've heard that "high school love is settled, and I'll take care of it when I get into college." After graduating from college, I will find a high school lover to marry. " To what extent can this statement be realized? We don't deny the love of college students. There are indeed many successful relationships among college students. Love is a unique commodity in the analysis of market supply and demand, and its particularity lies in the particularity of both supply elasticity and demand elasticity. Back to the hypothesis of Y and X, if their love has been decided, then for Y, its demand elasticity is zero, and X's supply elasticity is zero. Not every college student is the main body of the market, but we can still think that every college student is a potential love market entrant, regardless of whether he finally enters the market. The reason why we have not entered is that there are many other markets besides the love market. For example, learning, as the most fundamental task of students, should have become the mainstream, but unfortunately, due to the diversion of many markets such as love, it can only maintain a weak advantage. 5. Evaluation of input-output effect and possible thinking about how college students should treat their love. The general attitude of the school is not to oppose or advocate and let it develop freely. From the cost analysis of input and output, we can't provide an analysis method similar to Cobb-Douglas production function or constant substitution production function or Mennonlev type, because the love of college students, though simplified, is too complicated to be expressed in mathematical language. People's attitude towards life and its value orientation ultimately determine a person's choice. Choosing love in college means giving up other parts at the same time. Precious youth is still studying hard in the classroom under the romantic moon. Different choices of different people are determined by different utility satisfaction. Personally, I think the opportunity cost of college love is too high. If love can get enough rewards, such as being together for a lifetime, it can at least make both sides mutually beneficial during school and promote development. If it is only for spiritual emptiness or satisfying temporary selfish desires, it is difficult for input and output to be directly proportional. In addition, knowing each other for a period of time and not knowing each other's past will lead to information asymmetry in the market. If we only pursue impulsiveness without considering any consequences, it will inevitably lead to immoral behavior in the incomplete information market. Personally, I think we should consider more practical problems when making the choice of love market, rather than just praising love in a vacuum. It seems unreasonable to think about what role the chosen partner will play in his future, but it is necessary. Economics never sympathizes with the weak. The application of economics is objective and realistic, and the impermissibility of moral and ethical concepts cannot hinder it. Not long ago, it was regarded as a heterogeneous cohabitation trial marriage, and now it has become fashionable. The law once severely cracked down on illegal cohabitation, but now it is rarely mentioned. I wonder if this legal provision still exists? The analysis of economics has always been objective and calm, and there is no right or wrong in any event (this seems to conflict with the purpose of judging the overall progress of society, but we can comprehensively understand the latter fallacy and the component fallacy, and we can infer that they are not contradictory), just because of the subjective feelings of the market subject and object, that is, the difference in utility value. The value of commodities cannot be used as the basis of market transactions. Value is applicable in a certain market range, but the law of value is not applicable in broad economic analysis. Our ability is limited, and we can't demonstrate this yet. After the economic analysis of college students' love, we may get some enlightenment, which is much more complicated than the analysis of family investment income based on kinship. It is impossible for us to draw any qualitative conclusions, but we hope to understand some simple truths while applying what we have learned. As I said before, everyone feels that the utility is different, and their understanding and evaluation of this article will be different. The economic analysis of college students' love is just an attempt to understand traditional moral concepts and expand the application of economic analysis methods. The fallacy is inevitable and needs further study and correction.