Communities ¨ European Institute of Public Administration (EIPA) European Public Administration Network (EUPAN) European Social Insurance Platform (ESIP) Géant International Social Security Association (ISSA) Intigrity for researchers Socieux+ Education ¨ F - École nationale supérieure de Sécurité sociale (EN3S) In-house consultancy ¨ D - PD E - Isdefe I - Formez PA NL - TNO Ghent declaration on the challenges and common actions for European public administrations