A methodology has been developed to construct a time series of Russian Input-Output (IO) accounts for 2003 and subsequent years. This was based on the OKVED (All-Russian classifier of activities) and OKPD (All-Russian classifier of Products by Activity) classifications that are harmonized with the NACE rev. 1/CPA. The construction used IO Accounts for 2003 built in the Soviet classifications as the starting point.

An iterative algorithm has been proposed to transform these tables for 2003 into the OKVED/OKPD classifications. In the first step Use table (initial approximation) at purchasers' prices has been transformed using the conversion table bridging the Soviet classifications to the OKVED/OKPD classifications. In the second step the initial approximations of the 5 components of Use table at purchasers’ prices have been developed: the use of domestic goods and services at basic prices, the use of imported goods and services at basic prices; transport margins; trade margins and net taxes on products are developed. In the third step balancing each of the five tables has been taken place to ensure compliance of the row totals with the respective targets of national accounts. In the fourth step the final version of the use table at purchasers' prices has been calculated as the sum of the balanced five tables.

The method has been proposed to construct time series of IO Accounts at current prices based on these classifications for 2004 and subsequent years on the basis of transformed IO accounts for 2003 using the RAS procedure. RAS method is applied in two stages, first to determine the column totals of each of the calculated five tables and then to calculate all other items of these tables. Unlike traditional applications, in this paper RAS method is used to calculate matrices of intermediate consumption and final demand of goods and services simultaneously.