Seats and votes : the effects and determinants of electoral systems / Rein Taagepera & Matthew Soberg Shugart.

Why study electoral systems?
General features of electoral systems
Variables in electoral systems
New Zealand and Finland
History of the study of electoral systems
How to study electoral systems
Proportionality profiles of electoral systems
The effective number of parties
Issue dimensions and inverse square law of coalition durability
Deviation from proportionality
Magnitude : the decisive factor
Adjustment seals, thresholds, and effective magnitude
Generalized Duverger's rule
From the cube rule to the seat : vote equations
The cube root law of assembly sizes
The law of minority attrition and prediction of proportionality profiles
Overview of components and relations in electoral systems
Designing electoral systems
Implications for the scientific study of politics.