The total sum of squares and the total degrees of freedoms are disaggregated by calculating in sample variance and "between" sample variance and their respective degrees of freedoms. It is demonstrated numerically that both these measures add up to the total sum of squares and the total degrees of freedom.

The principle of effective demand, and the claim of its validity for a monetary production economy in the short and in the long run, is the core of heterodox macroeconomics, as currently found in all the different strands of post-Keynesian economics (Fundamentalists, Kaleckians, Sraffians, Kaldorians, Institutionalists) and also in some strands of neo-Marxian economics, particularly in the monopoly capitalism and underconsumptionist school In this contribution, we will therefore outline the foundations of the principle of effective demand and its relationship with the respective notion of a capitalist or a monetary production economy in the works of Marx, Kalecki and Keynes. Then we will deal with heterodox short-run macroeconomics and it will provide a simple short-run model which is built on the principle of effective demand, as well as on distribution conflict between different social groups (or classes): rentiers, managers and workers. Finally, we will move to the long run and we will review the integration of the principle of effective demand into heterodox/post-Keynesian approaches towards distribution and growth.

Auch wenn viele Ökonom_innen den Kritikpunkten zustimmen, wie die 2016 von dem Netzwerk Plurale Ökonomik und der Universität Kassel erstellte Studie EconPLUS aufzeigt, ändert sich die Lehre nur sehr langsam. Deswegen entstand im Netzwerk Plurale Ökonomik die Idee, selbst eine Online-Lehr- und Lernplattform zu pluraler Ökonomik zu erstellen. Diese Plattform Exploring Economics ging im Dezember 2016 online.

This course focus on the behaviour of individuals from an pluralist economic and an interdisciplinary bevavioural science apprach.