A Statistical Applied Method, Drawing on the Consumer Price Index and its Investigative Qualities

This paper describes the importance and utility of the CPI indices, from the general one to the detailed indices for food products, non – food products and for services and propose a statistical method based on the elasticity coefficient to analyse the evolutions ot these three important statistical instruments and of the real income, real consumption and real demand. The evaluations characterise the period of the entrance in the new millennium (2000) and the elasticity is reevaluated after eleven years in 2011. The methodology of this paper is only statistical, highlighting the qualities of as economic interpreter for elasticity of the index of consumer prices.