From the Introduction:

... Starting from the background outlined above, this paper deals with the following questions. To what extent is it theoretically meaningful to compare different economic systems? Apart from cultural, political and social considerations are there also economic considerations or incentive structures which can give ground to their different degree of sustainability? Is it worthwhile to devise and implement policies aiming at supporting variety rather than standardisation in existing models of capitalism? The model presented in § 2 is the tool we use to tackle these questions in a very simple and nevertheless meaningful way.

In § 3 numerical simulations are used to present four possible cases. In § 4 some speculations are added on a possible extension of the analysis to the cost functions.

The final paragraph summarizes the main, even if, preliminary results achieved.