The EFTA Statistical Office (ESO) is located in the premises of Eurostat, the Statistical Office of the European Union, in Luxembourg, and functions as a liaison office between Eurostat and the EFTA National Statistical Institutes. ESO's main objective is to promote the full inclusion of the EFTA States in the European Statistical System, thus providing harmonised and comparable statistics to support the general cooperation process between EFTA and the EU within and outside the EEA Agreement. The cooperation also entails technical cooperation programmes with third countries and training of European statisticians.