Predictably Irrational, Revised and Expanded Edition

Sigmund Freud explained it this way. He said that as we grow up in society, we internalize the social virtues. This internalization leads to the development of the superego. In general, the superego is pleased when we comply with society’s ethics, and unhappy when we don’t. This is why we stop our car at four AM when we see a red light, even if we know that no one is around; and it is why we get a warm feeling when we return a lost wallet to its owner, even if our identity is never revealed. Such acts stimulate the reward centers of our brain—the nucleus accumbens and the caudate nucleus—and make us content.

It seems then that instead of consumers’ willingness to pay influencing market prices, the causality is somewhat reversed and it is market prices themselves that influence consumers’ willingness to pay. What this means is that demand is not, in fact, a completely separate force from supply.

But the second, more important moral—one that we are just beginning to understand—is that trust, once eroded, is very hard to restore.

I suspect that most people and companies miss or ignore the fact that trust is an important public resource and that losing it can have long-term negative consequences for everyone involved. It doesn’t take much to violate trust. Just a few bad players in the market can spoil it for everyone else.

“Tom had discovered a great law of human action, namely, that in order to make a man covet a thing, it is only necessary to make the thing difficult to attain.”

Understand that relativity is everywhere, and that we view everything through its lens—rose-colored or otherwise. When you meet someone in a different country or city and it seems that you have a magical connection, realize that the enchantment might be limited to the surrounding circumstances. This realization might prevent you from subsequent disenchantment.

people don’t know what they want unless they see it in context.

humans rarely choose things in absolute terms.

The second mechanism is conditioning.

One is belief—our confidence or faith in the drug, the procedure, or the caregiver.