Why America has only two parties

My explanation is not institutionalist.

Why does America have only two parties? We usually hear it’s because of the voting system. Proportional representation (PR) causes more than two parties. And until the United States has proportional representation, you’d better not vote for third parties!

Not so much.

Continue reading “Why America has only two parties”

STV is also totally compatible with polarization

On Friday, I showed NOMINATE scores for Cincinnati City Council members elected under permissive rules. Polarization was super low* for some years because, in each of those years, a lone wolf was able to play coalition kingmaker in a hung parliament.**

Now look at 1947, which is new in this plot, and watch those parties diverge. Yup. STV is totally compatible with high levels of polarization. (I never said it wasn’t.)

cincyThru1947

Continue reading “STV is also totally compatible with polarization”