My clinical psychologist wife of 40 years has always had a close intellectual influence on me. When I was beginning to talk openly in the economics profession about irrationality in decision-making, I received a lot of criticism. Ginny would support my views and remind me that a whole other profession - psychology - studies people's irrational sides.

Consider our difficulties avoiding junk food and overspending. Such addictions were carefully planned-for by professional marketing teams.

The ability to focus attention on important things is a defining characteristic of intelligence.

A major boom in real stock prices in the US after Black Tuesday brought them halfway back to 1929 levels by 1930. This was followed by a second crash, another boom from 1932 to 1937, and a third crash. Speculative bubbles do not end like a short story, novel, or play. There is no final denouement that brings all the strands of a narrative into an impressive final conclusion. In the real world, we never know when the story is over.

Money management has been a profession involving a lot of fakery - people saying they can beat the market, and they really can't.

It amazes me how people are often more willing to act based on little or no data than to use data that is a challenge to assemble.

Economists who adhere to rational-expectations models of the world will never admit it, but a lot of what happens in markets is driven by pure stupidity - or, rather, inattention, misinformation about fundamentals, and an exaggerated focus on currently circulating stories.