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Contents Vol. 20, Issue 4 |

Allan Sikk and Rein
Taagepera, "How population size affects party systems and
cabinet duration,"
**Figures and Tables:**- Table 1. Population, seat allocation rule, mean district magnitude (M), assembly size(S), largest seat share effective number of legislative parties (N), and cabinet duration (C) for 25 one-seat and 11 multi-seat systems.
- Table 2. Actual geometric means of system characteristics and predictions based on mean population, 24 M 1/4 1 countries
- Table 3. Actual geometric means of system characteristics and predictions based on mean population, 11 M > 1 countries.
- Figure 1. The largest seat-share versus population for M 1/4 1 countries.
- Figure 2. The largest seat-share versus the product of population and district magnitude cubed.
- Figure 3. Effective number of assembly parties versus the product of population and district magnitude cubed.
- Figure 4. Deviation from theoretically predicted N versus N predicted by regression.
- Figure 5. Mean duration of cabinets versus the product of population and district magnitude cubed.
- Table 4. Predicted characteristics for countries with nationwide PR, and factor by which the actual value is off.
- Figure 6. Effective number of parties for given population and district magnitude.
- Figure 7. Residuals of largest seat-share versus population.
What are the practical implications? Countries are not prisoners of their population sizes. They are not locked in regarding their choice of party systems as the limits that population size puts on party systems are mediated by the choice of electoral rules. |