This work investigates the fundamental conceptual definition of a price index to resolve long-standing ambiguities in economic theory and practice. Sydney N. Afriat, a noted economist, draws upon his extensive research to construct a rigorous framework that moves beyond traditional surveys of the field. By focusing on the logical foundations of price-level notions, the author provides a systematic treatise that serves as both a theoretical clarification and a record of his own methodological contributions to the discipline.

Experts recognize this text as a specialized contribution to economic theory that prioritizes depth over breadth. Readers frequently note the technical density of the prose, which is intended for those already familiar with advanced economic modeling and index theory.