The Geometrycal Interpretation of the Relations between the Laspeyres, Paasche, Fisher and Drobisch Indexes and a New Presentation of the Bortkiewicz Relation

Abstract

The indexes numbers’s rol is to measure and to interpret the averagevariation in time, space or in relation with other systems of reference, in relativesizes, of the levels for the variables who belong to the statistical units from acollectivity. The indexes achieve a statistical analysis of the movement and ofthe change for these phenomenons. Therefore, the indexes are extremelyimportants in to underline the dynamic life which surrounds us.

Keywords

• indexes numbers
• geometrycal interpretation
• the Laspeyres index
• the Paasche index
• the Fisher index
• the Drobisch index
• the Bortkiewicz relation