Theodore Chadjipadelis is Professor of Applied Statistics and the Director of the Laboratory of Applied Political Research, Aristotle University, Thessaloniki, Greece. His research interests cover the field of applied statistics and mainly refer to issues of experiment design, statistical research training, public opinion, political and electoral behaviour, electoral geography, election systems as well as urban and regional programming and development. He coordinated the Greek section of the program C.C.S.

Andrés is the Regional Expert in Social Statistics at the ECLAC Statistics Division, where he offers advice and assistance to National Statistical Offices and other institutions within the National Statistical Systems of beneficiary countries. His work focuses on social statistics, survey methodology for household surveys, and small area estimation models, with particular emphasis on the Sustainable Development Goals monitoring framework. He currently serves as Vice-President of the International Association of Survey Statisticians.