 Marxian and socialist economists traditionally articulated and developed Karl Marx’s economic theories, but recently many socialist economists have revised traditional Marxian concepts and themes with tools borrowed from orthodox economic theory (Morishima 1973, Roemer 1981, 1982, Bowles 2012, Piketty 2014, Lebowitz 2015, Auerbach 2016, Beckert 2016, Jacobs and Mazzucato 2016).