There's a strange couple in Princeton.

That's Paul Krugman and Professor Albert Laszlo barabbasi.

It's not because of what happened between the two people, but because the subjects they studied are hard for the average person to understand. Even the headmaster of Edgar isgrub listened, but he just gave an indescribable look and didn't make any comment.

When it comes to the experience of meeting each other, it is also full of many accidents.

At first, it was because of the exchange of business cards at a dinner party after an academic conference, and then the unexpected coincidence of the two opinions on the big proposition of where human beings will go in the future, which resulted in the brain hole of "quantitative analysis of this evolution process through mathematical models".

It happens that one of them is an economist who is keen on Natural Science and the other is a physicist who is keen on sociology. They can complement each other in their respective professional fields.

Although when they were in St. Petersburg, they regretted not being able to bring the land boat into the group to study the mathematical model predicting the future, but even without the help of the world's best mathematician, the two men still did not give up their efforts in this direction.

Although so far there is no obvious progress in the relevant research is

In the cafe near the teaching building.

As usual, they sat opposite each other, enjoying their afternoon tea and chatting about some difficult topics about recent events.

“…… For interstellar high-speed travel, relativity determines the existence of time expansion in different coordinate systems. If there is a pair of twin brothers, one day the elder brother takes a spaceship to a civilization for a long space journey, while the younger brother stays on the earth. When brother comes back to earth, we will find that he is younger than his brother who stayed on earth There's nothing wrong with my interpretation. "

Listening to Professor Krugman's speech, Albert nodded with interest and said, "no problem But what does that mean in economics? "

"It doesn't mean anything just that, but if we replace the twin brothers with two speculators, the result is quite different. As you know, time is a very important cost in business. If the profit of a trade route is not as good as the regular interest of the parent star bank, the flight will be unprofitable. "

"There's a formula involved," he said, scribbling a line on the Notepad. Krugman pushed it in front of Professor Albert with his index finger. "It's the starting point of everything."

【pE*·qE·pα/pα*≥(C+pE·qE)·(1+r)2n。 ]When he looked closely at the formula on the note paper, Albert raised his eyebrows involuntarily.

“…… It's a strange formula. "

"It's strange, but it contains a very important theory - that's my first theorem of interstellar trade," Krugman continued with a boastful smile. "When trading between stars in the same inertial coordinate system, the calculation of interest should be based on the clock in the sphere inertial system, not the clock in the spacecraft system. At the same time, let the interest rate of the earth bank be r. if and only if the inequality holds, this trip will not lose money. "

Albert: "interesting point of view In other words, since there is the first theorem, is there the second one? "

"Of course, due to the existence of trade competition, the stars with the same inertial coordinate system will gradually tend to the same interest rate, which is the second theorem However, they are all useless now, "the old man chuckled, although he said the result full of regret, but his voice sounded quite pleasant." all these theories are based on the absolutely right situation of relativity, that is, we have not found the standard of exceeding the speed of light. "

"Now, although relativity is still correct, we have found a shortcut to other planets At least there are shortcuts in theory. When the time does not expand and the flight time is shortened, we do not have to consider that the long journey may eliminate the simple arbitrage behavior. "

"In fact, what I really want to say is Didn't you notice? That hyperspace theory affects not only physics, but economics. "

Upon hearing this, Professor Albert fell into deep thought.

After a long time, he sighed softly.

"You're right. The progress of science has brought great uncertainty to the mathematical model. Even the most perfect and rigorous calculation, it's difficult to predict the nonlinear leap forward. Even if our mathematical model has successfully predicted what might happen in the next 100 years, as long as there is a "Professor Lu" in the past 100 years, we can overturn all our predictions. "

Krugman nodded softly.

"What I am worried about is that it is necessary to weaken the role of individuals in the process of civilization to study the overall change of civilization, but when the role of individuals cannot be ignored, the process will not be so in line with the objective laws."

Just then, a young man walked quickly outside the cafe.He was wearing a gray suit and looked a little unusual, as if he had just seen or heard something strange. I saw that the man went straight to the two professors and said in a dreamlike voice.

"Professor..."

"Good afternoon, Dr. milson," said Professor Krugman with a friendly smile as he looked up at his assistant. "What makes you look so surprised."

"You asked me to collect the information about the settlement fund of outer star system of Cangwu that day..."

"Any news?"

"Yes," Mu Mu nodded. The assistant hesitated for a long time, then said in a difficult voice, "that fund It seems that Xiaotong is in charge of the management. "

“…… Xiaotong

Krugman was stunned.

It took a long time to get back to his senses. He sat right in the chair, looked at his assistant with disbelief, and asked, "wait, you mean Your junior sister? That little Tong

The assistant said with a wry smile.

"Yes It's already public. "

He opened his mouth with a blank expression, and after a long silence, Krugman said.

"I see For the time being. "

The assistant nodded and turned away.

Reclining in his chair, Krugman pinched his brow a bit.

Originally, in his plan, he also planned to find a way to contact the manager of the fund who has recently made great achievements in the field of economics, have a cup of afternoon tea or something, exchange academic problems, so as to complete the project he is thinking about.

But now

He didn't expect that this man would be his own student.

"I can't believe..." Albert, who was sitting opposite, opened his mouth and looked at Professor Krugman with a dazed face Your student is in charge of the fund. "

That's ten billion!

It's not as casual as graduation thesis!

It's not that Xiao Tong's ability is doubted, but will normal people give so much money to a doctoral student who hasn't graduated yet?

"It sounds really strange..." Putting down his index finger and thumb on his brow, Professor Krugman had a complicated expression on his face But it's like something he can do. "

In fact, Xiaotong's ability is good, and she is also very hard at ordinary times.

The only thing that needs to be said is the experience of practice.

In fact, according to his mentor's point of view, it might be better for her to start from a small assistant. It's too risky for her to directly start such a difficult job

But what do you say?

If we don't care about the gains and losses of several hundred million yuan, we can also ignore these problems.

It's one of her advantages to have such a good brother

“…… Unlike other students I've taught, she's one of the few people who can achieve a balanced development between theoretical and applied economics, especially in Princeton, where it's not easy to balance the two and make them all outstanding. "

Albert took a sip of coffee and asked curiously.

"Is she gifted?"

"Not the most talented," Krugman shook his head, "but she probably worked the hardest."

Moreover, the starting point is much higher than that of ordinary people.

Under the halo of Nobel Prize winner's sister, even if Lu Zhou did nothing, he could win the greatest resources for her just by virtue of his prestige in the academic world and his relationship with many professors in Princeton.

It's like a celebrity recommendation.

Her surname, in itself, is a very powerful recommendation letter, and it's also the kind of letter that is commonly used in academia and doesn't need to be highlighted actively.

In such a case, even if she doesn't work hard, she won't be very bad, let alone a girl who is no less diligent than her brother

"The future economic model is a very potential direction. Compared with other fields, we have very little research in this field. Now it happens to be in an era of rapid development, and the old theory has been difficult to adapt to new changes, even though it seemed to be very ahead of its time It's like the theory of interstellar trade I said before. "

It's over, Professor Krugman continued.

"I've learned that the topic of her recent paper is just related to the recently popular" alien colony fund ". Whether it's applied economics or theoretical economics, it's an opportunity for her. "

Professor Albert: opportunity

Krugman nodded.

"An opportunity to combine theory and application and find some balance in it."

"The whole economic circle is taking that" tiancang five alien colony fund "as a sample of future social and economic activities of human civilization, and as the manager of this sample. I believe that with her insight, it should not be difficult to find something After all, she is the closest person to the truth, even if I can learn more information than her. ""If I mean, if she can sum up the laws and find out something different about the human social and economic activities after the hyperspace theory. "

In the face of Professor Albert's increasingly surprised expression, Krugman said in a tone that didn't seem to be joking.

"Maybe in her lifetime, she really has the hope to touch the Nobel Prize..."