This authoritative collection explores Piero Sraffa's contributions to economics. The volumes cover the discussions around Sraffa's criticism of the Marshallian partial equilibrium method; his attack on Hayek's monetary overinvestment theory of the business cycle; his edition of Ricardo's works and correspondence and his clarification of the analytical structure of the classical theory of value and distribution; his reformulation of the classical theory; and the role of his work in the debates about the theory of capital and income distribution.