Ion Vallianos was a member of the research team of the Centre for Liberal Studies for the Legislative Consensus Index from July 2019 until April 2023. The Legislative Consensus Index maps the degree of convergence or divergence within the party system, and explores the parties’ positions on specific policy proposals in the long term.In this way, it judges the opposition’s programmatic and/or ideological agreement or disagreement with the ruling party.

You may read the study here (in Greek).