7. Data
for Computations 
As original data for calculation of
all the types of prices the inputoutput data of 96 branches in value
terms, compiled by the Central Commission of People^{'}s Control and
Statistics for the year 1962 were used. For our case, however, these data had
to be adjusted and complemented. 
At first, the original 96
branches were aggregated into 48 new branches. The reasons for this aggregation were as
follows:
a) The
aim of our
experimental calculations was primarily the verification of
computing methods and preliminary analysis of the results. It seemed therefore adequate to
give preference to a smaller matrix which would lead to a more simple and
faster processing. b) The matrix of production funds necessary for the calculation of some types of prices was not available for all of the 96 branches. 
For the pricecalculations the total
production of each branch has to be expressed in homogenous prices. Therefore,
the turnover tax was deducted from the inputoutput data. This implies that the
computed indices express relative increases in comparison to 1962 wholesale
prices. Or, more precisely, these prices were consumer prices without
turnover tax, i.e.. e. wholesale prices with the trade margin added. 
In order to obtain, all the costs
of production it was necessary to include the depreciation into the technical
coefficients. Therefore, the depreciation was "allocated^{"} into the
whole first quadrant of the inputoutput
table. Of course this allocation could have been only approximate and therefore
certain inaccuracies could have appeared in the resulting prices. 
It was necessary to complete the data of
production funds, which are not included in the inputoutput table. Data currently
collected by the statistical service were used for this purpose. These data are
classified according to the scheme of the inputoutput table, they
are, however, collected on the enterprise base and not on the base of pure
branches. This is a source of the further inaccuracy. Further it has been not
possible to distribute the production funds data completely into the square matrix,
but only into the five rows according to the origin of these funds (other rows
remained zero), which again causes some inaccuracies in calculations.
Production funds data in purchase (cost) prices and in ^{"}residual" values (after deducting the
depreciation) have been used alternately. 
In the process of calculations the influence of foreign trade on prices was not taken into consideration. This means that all the costs (even in the case of imported products) were evaluated according to prices of home products. This fact also distorts to a certain degree the results, especially in some specific branches in which the home costs are substantially different from the import prices. 



