Statistical Approach to the Trade Prices Analysis

       Daria V. Filatova, Alexander V. Tsukanov

     Economical  process  description  requires   great
number   of   parameters.  Most   of   parameters   are
interconnected. At the same time it is  very  difficult
to find out the main set of parameters, which affect to
the process.
     For   the   purpose  of  initial  parameters   set
reduction  and  main set determination  method  of  the
trade  prices  and  community  differentiation  indexes
operative  measurement  was  created  on  a   base   of
correlation  analysis, principal  components  analysis,
analysis  of  variance  and least  squares  method.  To
complete   the   analysis  of  the  trade  prices   the
following model of the price was used:
                 yijk = m* ai* bj* gk,
where  yijk  is  a price of a product,  j  is  a  goods
number, i is a fixed moment of the time, k is a type of
a  sale, is  a basis  price of all products,  ai is  an
inflation  factor, i.e. change of the cost of monetary,
bj  is  a  factor  of prices spread of  the  j  product
(relative  price  of the goods), gk is  a  coefficient,
which  shows distinction among  the price of the  goods
in the market.
     As  an  example  of this method usage  results  of
Ukraine  inflation trend prediction are given.