Whatever you can rightly say about India, the opposite is also true. - Joan Robinson

If knowledge develops as capital accumulates, there need be no tendency to diminishing returns, and with constant returns there can be no tendency for the rate of profit to fall (always assuming that the problem of effective demand as ruled out).

But the tygers of wrath go the other way. Do not ask me why. It is just a fact I noticed when I was looking through field glasses from a machan.

Michal Kalecki's claim to priority of publication is indisputable.