The Methodological report - Employment in the national economy according to administrative data sources summarises the results of work carried out between 2014 and 2020 on the methodology for estimating the number of employed persons in the national economy using administrative sources. The methodological report did not affect the design and organisation of the ‘Survey on Employment in the National Economy’, which, until the data for December 2021, was conducted in accordance with the methodology described in the methodological report published in 2020.