[EM] Proportionality-preference tradeoffs

[Kristofer Munsterhjelm]

After reading the post on measuring multiwinner goodness (and writing a 
reply to it), I started to think of how to determine how good the 
different multiwinner methods actually are.

One way to do that is by criterion compliance. But there is another: 
while proportionality can't be expressed in terms of majoritarian 
quality (preference), we can still determine the Pareto front, given a 
way to measure proportionality and preference.

There are many ways to do so - I have chosen one combination (normalized 
Sainte-Lague index and Bayesian regret). The results are here: 
http://munsterhjelm.no/km/elections/multiwinner_tradeoffs/

May it be of interest! :-)