A depression is a situation of self-fulfilling pessimism.

In all the talk in the Principles (as opposed to the formal analysis) it is not the saving of rentiers but the energy of entrepreneurs which governs accumulation.

If a rise in wages does not raise prices, a fall will not reduce them.

Economic theorists should not make such a production about taking a rabbit out of a hat after having put the rabbit into the hat in full view of the audience.

Capital' is not what capital is called, it is what its name is called.

Rosa Luxemburg maintained that the capitalist system can keep up its rate of investment (and therefore its profits) only so long as it is expanding geographically.

The very nature of economics is rooted in nationalism. ... It [was] developed ... in the hope of throwing light upon questions of policy. But policy means nothing unless there is an authority to carry it out, and authorities are national.