Likewise, the Yale University professor was candid about not putting too much thought into those issues. When asked how he saw China's central bank's move to halt use of QR codes and virtual credit cards, he replied: "I can't presume to answer these regulatory issues for China because it is too complicated for me as someone outside the country."

But these questions did not really seek an answer; they basically just revealed what we Chinese fear: Even if Professor Shiller had given a definitive answer to one, similar questions would be posed to other economists.

For Shiller, a percentage point lowering of China's GDP growth is "normal": economies have risen and fallen historically; but for many Chinese, any slowdown is a keenly felt pain.

All politics is local. So is news. Shiller's unwillingness to give definite answers might have disappointed the Chinese media, but if you listened carefully to what he said, it underscored what you can and cannot expect from economists: They do not hold a crystal ball in their hands. What they tend to be good at is helping people understand the world in its present form. Below is a response from Shiller that really saw his brilliance shine through.

When asked by a Chinese economist if finance really makes a better society, he said: "I don't think I would blame finance for all these things (economic crises, rising inequality, etc). Finance, in essence, is technology. People who master the technology might use it to make themselves wealthy. Finance is about risk management, and risk management is essential to reduce any inequality.

"I don't mean to be so optimistic about finance," Shiller continued. "It is the people, the culture which make the society, and progress can be uneven. "The problem is that humans are very irregular. They can be kind and generous. They can be selfish and grasping. We have to have institutions that respect people's real feelings, that try to produce a sense of community.

"But we can't completely eliminate the selfish side of human beings either, because that is what drives and motivates them. So you have to get a right balance.

"What I have been saying is our financial system is a product of experimentation. It is a bit like a sporting event. In football, for example, you make rules that encourage ruthlessness. We want them to play ruthlessly. But there are certain things that you don't want to do that might hurt someone seriously. The players thus act ruthlessly toward each other on the field but right after, they can have beer together.

"That's the vision of a good society. It can't be perfect, because people will never be totally unselfish and loving. We have to try to develop a system that balances different human aspects. "

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