In 1982, Decree No. 82.219 of 3 March 1982 extended the objectives of the School to the training of statisticians at the highest level, the Senior Statistician-Economist (ISE) programme. This same decree gives it the name “École Nationale Supérieure de Statistique et d’Économie Appliquée”, ENSEA (Institute of Statistics and Applied Economist).
In 1984, ENSEA signed an agreement with the INS of Niger to open a training course in Niamey for Advanced Statistical Officers
In 1987, the School opened the Senior Statistician-Economist (ISE) training course, which had until then been delivered by the ESDC in Paris.
A new course was created at the beginning of the 2002-2003 school year: the Diploma of Advanced Studies in Statistical Analysis Applied to Development (DESS-ASAD). This course is organized in partnership with the University of Cocody (Abidjan) and the University of Versailles Saint-Quentin-en-Yvelines (France).
In 2005, ENSEA signed an agreement with the INSD of Burkina Faso to open a training course in Ouagadougou for Advanced Statistical Officers at the National School of Financial Governance (Ecole Nationale des Régies Financières).
Also in 2005, ENSEA obtained the label “WAEMU Regional Centre of Excellence”.
In 2008, ENSEA opened at the request of the INS of Niger, a two classes special training cycle for the Assistants Statistical Officer.
The auditors of this cycle were reclassified after one year of training in the functions of Senior Statisticians within the Nigerian statistical apparatus.