This comprehensive three-volume edition brings together the most important contributions in capital theory, from its classical origins to its modern manifestation in endogenous growth models. The readings examine the recurring controversies, and the two incisive, and sharply contrasting introductions by Bliss and by Cohen and Harcourt provide the reader with context and guidance for making sense of this central, contentious and often difficult literature.These authoritative volumes will be an invaluable source of reference for all of those with an interest in this subject.