Duverger's law
Efficiency gap
– Measure of the fairness of electoral districts
Micromega rule
– Preferences of political parties for electoral systems - a theory that political parties choose voting systems
Median voter theorem
– Theorem in political science
Mouseland
– Canadian political fable
Observations named after people
– Adages and sayings named after a person
Two-party-preferred vote
– Result of election after distribution of preferences
https://en.wikipedia.org/wiki/Duverger's_law