I am worried that the collapse of home prices might turn out to be the most severe since the Great Depression.

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.

In the longer run and for wide-reaching issues, more creative solutions tend to come from imaginative interdisciplinary collaboration.

As I write in 2012 we certainly do not believe that it is over yet, and the worst may be yet to come. Efforts by governments to solve the underlying problems responsible for the crisis have still not gotten very far, and the 'stress tests' that governments have used to encourage optimism about our financial institutions were of questionable thoroughness.

Stock prices are likely to be among the prices that are relatively vulnerable to purely social movements because there is no accepted theory by which to understand the worth of stocks....investors have no model or at best a very incomplete model of behavior of prices, dividend, or earnings, of speculative assets.