8. Disequilibrium and Equilibrium Methods in the Theory of Price Movements -- (i) The Disequilibrium Method -- (ii) Two Equilibrium Methods -- 9. A Note on the Pricing Problem in a Community with Centralized Planning -- ALGEBRAIC DISCUSSION OF THE RELATIONS BETWEEN SOME FUNDAMENTAL CONCEPTS -- 1. Definitions and Notation -- 2. Micro-economic Values -- (i) Relations valid both for Prospective and Retrospective Values -- (ii) Relations between Prospective and Retrospective Values -- (iii) Relations between Subjective Values -- (1) Subjective Capital Values estimated at the Same Point of Time