In the Statistical Office of the Republic of Serbia, the expert mission was held on 14- 15 September, on the subject Usage of administrative data from Tax administration for the needs of calculation of average monthly salaries and wages. The lecturers were experts from Croatian Bureau of Statistics, Mr Marko Kristof, General Director and Ms Snjezana Varga, Head of the Labour market Division. Expert mission was organized with TAIEX program support.