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

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

[There will be movement toward] behavioral economics... [which] involves study of those aspects of men's images, or cognitive and affective structures that are more relevant to economic decisions.

Communication can only take place among equals.

As long as man was small in numbers and limited in technology, he could realistically regard the earth as an infinite reservoir, an infinite source of inputs and an infinite cesspool for outputs. Today we can no longer make this assumption. Earth has become a space ship, not only in our imagination but also in the hard realities of the social, biological, and physical system in which man is enmeshed.

We should always bear in mind that numbers represent a simplification of reality.

We are born to love, as we are born to breathe and eat and drink.