Wikipedia Definition
Post-Keynesian economics is a school of economic thought with its origins in The General Theory of John Maynard Keynes, with subsequent development influenced to a large degree by Micha? Kalecki, Joan Robinson, Nicholas Kaldor, Sidney Weintraub, Paul Davidson, Piero Sraffa, Jan Kregel and Marc Lavoie. Historian Robert Skidelsky argues that the post-Keynesian school has remained closest to the spirit of Keynes' original work.[1][2] It is a heterodox approach to economics[3][4] based on a non-equilibrium approach.[5]