Usefulness depends on tractability.

- Kenneth Arrow

Unsolved problems, that's one of the great signs of progress in my opinion.

- Kenneth Arrow

The MD is well aware that the forecasts are no good but he needs them for planning purposes.

- Kenneth Arrow

One way of looking at Impossibility Theorem is that we proposed some criteria for what a good system should be: what is it you want from a voting sys…

- Kenneth Arrow

The world is changing. We're not really proceeding on a stationary basis.

- Kenneth Arrow

One thing I learned from meteorology is that being an actual science was no guarantee of exactness.

- Kenneth Arrow

I think the idea that a society has to be responsible for all of its citizens, those who do well and those who do not, is really a precondition of a …

- Kenneth Arrow

Knowledge is a free good. The biggest cost in its transmission is not in the production or distribution of knowledge, but in its assimilation. This i…

- Kenneth Arrow

Vast ills have followed a belief in certainty.

- Kenneth Arrow