Original sentence: From this assumption neoclassical economists derive the familiar supply and demand functions which, under certain conditions, will lead to a determinate market clearing equilibrium.Heterodox economics reject these fundamental assumptions on which most of neoclassical economics theory has been built.Neoclassical ecoomics begins with the a priori assumption that agents are rational and that they maximize their utility or profits subject to environmental constrainsts.Under even stricter conditions this equilibrium will be efficient in the sense of Pareto
Edited sentence: Heterodox economics reject those fundamental assumptions, or "dogmas", over which the edifice of neoclassical economics has been built.Neoclassical economics begins with an a priori conception of markets and economies as determinate systems that by the action of "individual agents" alone tend toward an efficient and market-clearing equilibrium