The ability to work with systems of general equilibrium is perhaps one of the most important skills of the economist - a skill which he shares with many other scientists, but in which he has perhaps a certain comparative advantage.

In any evolutionary process, even in the arts, the search for novelty becomes corrupting.

The use of isoquants to describe the production function did not develop to any great extent until the thirties.

The evolutionary vision is agnostic in regard to systems in the universe of greater complexity than those of which human beings have clear knowledge.

It is almost as hard to define mathematics as it is to define economics, and one is tempted to fall back on the famous old definition attributed to Jacob Viner, "Economics is what economists do," and say that mathematics is what mathematicians do. A large part of mathematics deals with the formal relations of quantities or numbers.

Every culture, or subculture, is defined by a set of common values, that is, generally agreed upon preferences. Without a core of common values a culture cannot exist, and we classify society into cultures and subcultures precisely because it is possible to identify groups who have common values.

Justification, in terms of the broadening of freedom, for any particular form of institution of property must be argued in terms of whether the losses caused by the restrictions imposed are greater or less than the gains derived from the elimination of costly conflict.