Every girl is a prisoner
Ralphyang Posted on 2005-1-5 8:36:00
Summer is here, the girls on the street show, and Yan Tingting. This is a pleasant season that makes people feel away. I don't know if everyone agrees with my opinion: beautiful girls on the street have more and more. Why will the girl become more beautiful? I have proposed a few hypothetical: First, the improvement of nutrition levels and diet structure is not beneficial for girls' look, so with the improvement of people's living standards, more and more beautiful girls will be more and more; the second, the increase in population fluidity The girls have been looking for work to Greater Cities, because they can find better personal development opportunities, so a regional economic prosperity is related to the beautifulness of the girl on the street; third, the change of the concept makes the girl Dorse of bravely show your beauty, on the other hand, make people more boldly admire the girl's beauty. It is said that beauty is to discover, so the more beautiful girls who have aesthetic capabilities are in the street.
There is also the last point I want to come out alone. That is, the girl is getting more and more understanding to beautify yourself. Many ways to beautify themselves: put on fashionable clothes, carefully make up, and even do beauty surgery, etc. Under budget constraints, girls' optimization issues are the combination of assets that can make their own benefits. The proverb said: "The poor family net sweeps, the poverty woman's net comb". As long as you put a certain element (including capital and human capital), the girl can always make their appearance more charming.
However, this is the absolute benefit of the girl, that is, her now looks more good than the past appearance. If relatively revenue is considered, the situation will be slightly different. Assume that the girl will be a little vanity, they all want to overwrite the group. Assuming that a group of girls is not big, all the cardamom is annual, this time, if other girls do not make makeup, only one girl makeup, such as she dyed red nails, then this girl will lead to everyone, everyone will feel She looks good. Other girls are not fat, and the natural groups will follow the imitation, and all girls have dyed red nails. At this time, if there is a girl who wants to appear, you must come up with a new idea. For example, she wipes the lipstick, which will let her take the head in the next day, but other girls will quickly follow the imitation, all of the The girls have wiped lipsticks. When several rounds, we will find that all the girls have dyed red nails, all girls have wiped lipsticks, all the girls have a rouge, all the girls are wearing a hanging vest, but from the perspective of relative benefits. Look, there is no girl to do more than all the girls don't make makeup. Moreover, maybe the girls suddenly bored this "arms race", but gives the other girls, the girl who refuses makeup will look like a ugly eight strange, so all the girls have to continue makeup. This is the "prisoner dilemma" that is often said in the game theory, and every girl has become a prisoner.
In fact, every economist and girl are also prisoners. What I want to say is why the mathematical tools used by economists are increasingly complex. Although there are many reasons for economic rigidity, it is also very likely to be rational, but I still prefer my agenous interpretation. Each economist wants to be smarter than others. At this time, an economist discovered that the mathematics who didn't understand in the paper took someone to live. Especially the editor does not dare to shoot the papers that you don't understand. Because they are afraid that others know that they don't understand. However, in the real smart mathematician, the mathematics tools used by economists are the hobbies. This is also why other economists soon learned from the cause of a hard mathematical tool. So I wanted to take a tip-sized economist to find a more tough mathematics tool, but as long as they find it, other scholars can quickly learn. Finally, more and more mathematics for economists have more and more, and the door-to-door is increasingly improving economics, and there is a very big increase in the ability of the economics to explain the world. Tired of this boring game, want to do not need mathematics in your own paper? Give other economists are still biting the pencil header mathematical question, the guy who don't have mathematics will look extra stupid, and the papers have not written out the opportunity to publish. What is the difference between girls and economists? The girl's competition brings positive externalities, and their beauty makes them more confident and makes our mood more pleasant. So we have to encourage them to continue to compete and continue to make beautiful prisoners. The competition of economists has brought negative externalities. They let the whole society understand the understanding of economics, more unfriendly attitudes to economists, so we have to encourage them to cooperate, from tomorrow, all economists You can only write with vernacular literature.
Do you still do or do your brother?
- Analysis of game theory of men and women
The author is pressed: I saw a post of a post before, I saw a question that she was confused. When learning game theory today, I suddenly feel that this problem can be analyzed with the knowledge of game theory. Initial analysis, please Everyone will advise. )
My sister's question is as follows: (huh,! "I have to find this post) My GG wants to do that with me, I hesitate, he said too much now. I believe in him, but as a girl: I have to think more, "If he doesn't love me?" I love him very much, I don't want him to disappoint, what should I do?
Below we will analyze this question: (Because it is a problem with my sister, the following analysis is to analyze the sister's position) We are always assumed that the sister and my brother are rational, my sister is correct, my sister is very Love my brother, but, if there is a little uncertain, is my brother really love my sister?
In the first case, brother loves sister, then we can make the following definition: in this game:
Participants: brother, sister
Action: Do not do; get married; not married (because of the sister, what is the choice of her is still doing, and the evaluation of the consequences of doing and doing depends on whether the brother will marry your sister in the future.)
RESULTS: There are four results (only the results here, do not analyze the reason, such as the causes of the two people do not get married):
Result One: Sister agrees with my brother (hereinafter referred to as being made); future brother and sister marriage.
Results Two: Sister agreed to do with my brother; future brother is not married with my sister
Results Three: Sister is not doing with my brother (hereinafter referred to as not done); future brother and sister marriage. Results 4: The sister is not doing with my brother; the brother is not married with my sister.
For the result 1. We think that this result is not bad, so we think that its satisfaction is 20. For my brother, this result is not bad, the satisfaction is 20
For the result, we think that you have not been to your sister, this result is relatively bad, so we believe that its satisfaction is 0. For my brother, this result is not bad, and its satisfaction is 20
For the result, we think that this result is not bad for your sister, so we still think that its satisfaction is 20. For my brother, I need to pay for the price of 10, and the satisfaction is 10.
For the result four, we think that the result is worse than the result, but it is better than the result three! Therefore, we think its satisfaction is 10. For your brother, nothing is not available, and its satisfaction is 0.
This is a static game of a complete information:
younger sister
Do not do
Brother: Marriage 20 20 10 20
Not married 20 0 0 10
So, how should my sister analyze this game?
Assuming that the brother is not married with my sister: That means that there will be the results of the two and the results, for my sister, the best choice is "not to do", suppose to marry the brother and my sister in the future, then there will be appear Results Two results of the two and the results, for the sister, doing and do not do all the best choices,
In combination with the above two cases, the best choice for my sister is not done, because the future brother is not married with my sister, the best choice of my sister is "not to do", even if the brother and my sister are married, this choice does not have to be Another choice is worse!
In this way, the best choice for my sister is: do not do
If your brother realizes this, and his brother is rational, then this is his best choice is "married to my sister", this game's Nash balance is (not, marriage)
In the second case, my brother didn't really love my sister, but my sister didn't know.
However, the above assumptions have been ignored a situation, that is, the problem worried about the sister, that is, if you don't do your brother, she is worried that I will lose my brother. In her opinion, I'm a thing of my brother is a thing that cannot be tolerated, then If you lose your brother because you don't do it with your brother, your sister will be very painful. The satisfaction is 0. For your brother, if your sister doesn't do it with him, he will break up with him, and its satisfaction is 0. However, if the sister does not do it with him, he can't stand it, its satisfaction is -10, then the original result 4 has a redefined, there is the following four results:
For the result 1. We think that this result is not bad, so we think that its satisfaction is 20. For my brother, this result is not good or bad, and its satisfaction is 20
For the result, we think that you have not been to your sister, this result is relatively bad, so we believe that its satisfaction is 0. For my brother, this result is not bad, because he doesn't really love my sister. When this result, he can find a new sister, its satisfaction is 30
For the result, we believe that this result is not bad, but it is not as good as the stress of the brother breakdown in advance, so we still think that its satisfaction is 10. For your brother, satisfaction is not as good as the result. If you don't love your sister but in the end, you will receive marriage with your sister, and you need to pay a wait cost, and your satisfaction is 15 (here, there is a brother doesn't really love my sister). For the result four, we think that the sister is coming, because the brother is lost! The sister is very painful, but it is better than the result, so we think it is 10. For your brother, it is not what is not available, and its satisfaction is 0.
The static game for new full information is:
younger sister.
Do not do
Brother: Marriage 20 20 15 10
Branch 30 0 0 10
This has a new Nash balance, for (doing, breaking up), (not, marriage)
However, if the sister thinks, she doesn't work with my brother in time, my brother will not break up with her, that is, if she doesn't do my brother, my brother will think with her, this threat is unbelievable, she is not intimidated, Because, once the sister has chosen "do not do", the best choice of my brother is not "breaking up", but married.
This has a new Zerten's childbinity, the central meaning of this concept is to remove the unbelievable strategic threats included in Nash balance to make the balanced strategy are not included in the unbelievable threat. This is, the new Nash is equilibrium (not doing, marriage).
After this result, I also feel incredible, but it is reasonable, analysis is strict, so the conclusion is also available for sisters. If you are inconvenient for the future actions in the brothers, I hope not to marry me! Dear brothers in advance! I am a brother.
