Seminal essay from 1979 from Diane Elson arguing for the importance of Marx’s “Value Theory of Labour.” The essay was a product of debates within the Conference of Socialist Economists (CSE). Full PDF of the essay also below. Note: As Soren Mau pointed out, more than two decades before Elson, Raya Dunayevskaya suggested that we should speak of the ‘value theory of labour’ rather than the ‘labour theory of value’. See 'The Logic and Scope of Capital, Volumes II and III' here.