[SEQ RERUN] Stop Voting For Nincompoops

MinibearRex

Today's post, Stop Voting For Nincompoops was originally published on 02 January 2008. A summary (taken from the LW wiki):

Many people try to vote "strategically", by considering which candidate is more "electable". One of the most important factors in whether someone is "electable" is whether they have received attention from the media and the support of one of the two major parties. Naturally, those organizations put considerable thought into who is electable in making their decision. Ultimately, all arguments for "strategic voting" tend to fall apart. The voters themselves get so little say in why the next president is that the best we can do is just to not vote for nincompoops.

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This post is part of the Rerunning the Sequences series, where we'll be going through Eliezer Yudkowsky's old posts in order so that people who are interested can (re-)read and discuss them. The previous post was The American System and Misleading Labels, and you can use the sequence_reruns tag or rss feed to follow the rest of the series.

Sequence reruns are a community-driven effort. You can participate by re-reading the sequence post, discussing it here, posting the next day's sequence reruns post, or summarizing forthcoming articles on the wiki. Go here for more details, or to have meta discussions about the Rerunning the Sequences series.

Today's post, Stop Voting For Nincompoops was originally published on 02 January 2008. A summary (taken from the LW wiki):

Many people try to vote "strategically", by considering which candidate is more "electable". One of the most important factors in whether someone is "electable" is whether they have received attention from the media and the support of one of the two major parties. Naturally, those organizations put considerable thought into who is electable in making their decision. Ultimately, all arguments for "strategic voting" tend to fall apart. The voters themselves get so little say in why the next president is that the best we can do is just to not vote for nincompoops.

The Czech Senate (upper chamber of the parliament) uses top-two runoff too and a lizard-lizard competition in the second round happened in 14 out of 27 districts, which is only slightly more than half (lizard defined as a candidate of one of the two strongest parties). Remarkably, there was no lizard-free second round, at least one lizard succeeded everywhere. In the second round, 20 lizards won. It means that out of 13 lizard vs. non-lizard competitions, 6 were won by lizards. It seems to indicate that lizard victories aren't largely due to "strategic" voting: if it were so, non-lizards would massively outcompete lizards in a direct confrontation.

though others might appear, for example regional parties like there are in Canada

What reason for appearance of regional parties is present in a top-two runoff system and absent in the plurality system?