The analysis of engineering systems and the understanding of economic structure have advanced since then, and the time is now more ripe to bring thes… - Arnold Tustin

Methods by which engineers stabilise their mechanisms suggest analogous possibilities for stabilising economic systems.

Actual economic systems are constantly subjected to change and disturbances, which would result in irregularity.

The separate excitation of the dynamo corresponds with the independently determined investment in the economic model, and the total excitation with income. Perhaps in this electrical age, the conventional metaphor of ‘priming the pump’ might be dropped in favour of ‘exciting the dynamo’.