Glossary:Pillars classification
This classification is often used for studying pension systems. It distinguishes three pillars: first pillar schemes are collective compulsory schemes, second pillar schemes are collective voluntary schemes, and third pillar schemes are individual voluntary schemes. Basic and set supplementary schemes are sometimes referred to as first pillar and second pillar schemes, but this classification is not always accurate and depends on a national approach. Third pillar consists of individual arrangements that are not part of social protection in the definition of the ESSPROS.