| brazil | Brazilian Lower Chamber Electoral Results |
| denmark | Danish Lower Chamber Electoral Results |
| enp | The Effective Number of Parties Index |
| fractionalization | Fractionalization Index |
| hh | Herfindahl–Hirschman concentration index |
| hiperfrac | Hyperfractionalization Index |
| lh | Loosemore–Hanby Index |
| lsq | Least Squares Index |
| nationalization | Party Nationalization Index |
| renewal | Parliamentary Renewal |
| rice | Rice Index |
| spain | Spanish Lower Chamber Electoral Results |
| tbi | T Imbalance Index |
| volatility | Electoral Volatility Index |