It is submitted, for the very large number of different traditional type formulae to determine price indices associated with a pair of periods, which are joined with the longstanding question of which one to choose, they should all be abandoned. A method is proposed whereby price levels...

This paper proposes to clarify some important questions that are still open in the field of index number theory. The main results are the following: (i) the so-called Quadratic Identity on which the superlative index numbers are based can be applied in more general cases than those traditionally...