Determining the Normal Degree of Capacity Utilisation: Insights from the History of Economic Thought

Several issues related to the normal degree of capacity utilisation have become crucial in the recent debate within demand-led growth theories. By going back over the history of economic thought, the paper aims to highlight the main findings that may nourish the current debate. Our reconstruction identifies the main factors affecting the firm's choice as to the size and degree of utilisation of productive capacity and draws attention to three points that appear to require particular attention in the debate on demand-led growth: firstly, the degree of utilisation corresponding to the maximum profit does not necessarily correspond to the minimum unit cost associated with the plant; secondly, the size of productive capacity depends on the variability of the output produced by the firm; finally, and in connection with the two previous points, the determination of normal utilisation requires defining the market structure in which the firm is supposed to operate and is therefore affected by the notion of competition adopted.