Instability, stationary utilization and effective demand: A structuralist model of endogenous cycles

Within the framework of an aggregative macro model with equilibrating output adjustment, Harrodian instability and a constant long-run utilization rate are reconciled with the principle of effective demand by endogenizing the capacity output-capital ratio. As stabilizing forces, distribution and debt dynamics are considered. Introducing non-linearities in the investment function, our model generates limit cycles consistent with empirical observations for the US, i.e. counter-clockwise in the utilization-wage share and utilization-debt space. We argue that with an endogenous capacity-capital ratio the principle of effective demand, the paradox of thrift as well as the paradox of cost may hold despite a constant long-run utilization rate.