Fear and euphoria are dominant forces, and fear is many multiples the size of euphoria. Bubbles go up very slowly as euphoria builds. Then fear hits, and it comes down very sharply. When I started to look at that, I was sort of intellectually shocked. Contagion is the critical phenomenon which causes the thing to fall apart.

Greenspan, who knew so much more than most, knew far less than most supposed.

Any onset of increased investor caution elevates risk premiums and, as a consequence, lowers asset values and promotes the liquidation of the debt that supported higher asset prices, ... This is the reason that history has not dealt kindly with the aftermath of protracted periods of low risk premiums.

Institutions of the newer participants in global finance had not been tested, until recently...recent crisis have underscored certain financial structure vulnerabilities that are not readily assuaged in the short run.

The process of innovation is, of course, never ending.

At the risk of some oversimplification, if the skill composition of our work force meshed fully with the needs of our increasingly complex capital-stock, wage-skill differentials would be stable, and the percentage changes in wage rates would be the same for all job grades.

Clearly, sustained low inflation implies less uncertainty about the future, and lower risk premiums imply higher prices of stocks and other earning assets. We can see that in the inverse relationship exhibited by price/earnings ratios and the rate of inflation in the past. But how do we know when irrational exuberance has unduly escalated asset values, which then become subject to unexpected and prolonged contractions as they have in Japan over the past decade?