present paper. Key Words Exact index numbers, true index numbers, multilateral indexes, the Fisher ideal index, cost … true set of multilateral indexes (7) cannot put into VW form (6). Using the VW definition a true system, their functions … purposes, Diewert’s system of share functions, S(P,Q), is equivalent to VW’s system of multilateral indexes, F …

; Price index; Substitu- tion bias; Multilateral indexes * Funding from the Australian Research Council Discovery Grant …