Interactive Overview of Combinations of Electoral Systems & Quota Types

Electoral Systems

  • List Proportional Representation with small districts (List PR)

  • List Proportional Representation with large districts (List PR)

  • First Past The Post (FPTP)

  • Two-Round Systems (TRS)

  • Parallel Systems

  • Mixed Member Proportional (MMP)

  • Block Vote (BV), Limited Vote (LV) and Single Non-Transferable Vote (SNTV)

  • Party Block Vote (PBV)

  • Alternative Vote (AV)

  • Single Transferable Vote (STV)

  • Borda Count (BC)

Quota Types

  • No Quota

  • Reserved seats: certain districts for women candidates only

  • Reserved seats: a tier for women candidates only

  • Reserved seats: best loser system

  • Nomination: percentage regulations without placement mandate/rank-order rules

  • Nominations: percentage regulations with placement mandate/rank-order rules (top-ranking, zipper quotas)


Green = Best-fit Combinations

Yellow = Medium-fit Combinations

Red = Non-favourable Combinations

Disclaimer: Maps presented do not imply on the part of the Institute any judgement on the legal status of any territory or the endorsement of such boundaries, nor does the placement or size of any country or territory reflect the political view of International IDEA. Maps are used in order to add visual clarity to data.