In respect of household purchases abroad also special surveys are held. Normally, these sources are available when the most recent quarterly accounts are estimated. Other important price indices are the foreign trade price indices, the quarterly construction cost index, and the investment price index. The data for small enterprises not included in the quarterly enterprise survey and for the hidden economy are estimated by extrapolating annual accounts estimates by changes recorded for the medium sized surveyed enterprises. Household budget survey's data are used for the estimate of own-account production of farmers.
Methodology is the same.
At second, reconciliation between quarterly and annual figures is provided in this sense. Certain data on households' consumption and on gross fixed capital formation are estimated by extrapolating the annual estimates. In case of households expenditures it mainly concerns estimation of consumption of alcoholic beverages, cigarettes and imputed rents. Figures on gross fixed capital formation are estimated by using annual data figures for the sector of nonprofit institutions and in the sector of nonfinancial enterprises for units with less than 20 employees. Method of commodity flows has not been utilized yet.