Advertisements
Advertisements

Rational investors and irrational voters

It seems like there is a bit of a gap opening between prediction markets and opinion polls when it comes to the likely outcome of the US presidential elections in recent days.

Hence, the prediction market Predictit now has a 81% (19%) implied probability that Clinton (Trump) will win, while the opinion poll aggregator over at Nate Silver’s FiveThirtyEight-side has a implied probability of 88.1% (11.9%) that Clinton (Trump) will win.

If we look at the last couple of months it seems clear that the polls have been somewhat more extreme in both direction than the prediction markets.

This to me is interesting as it seems to indicate there is more “animal spirits” in the opinion polls than in the prediction markets. Or said, in another way this could be an indications that when we act as investors – betting on the outcome of presidential election – we behave more rationally than when we are voting?

Obviously opinion polls and prediction markets are not measuring the same thing. Prediction markets “predict” what the outcome will be of an election at a future date, while opinion polls measures how voters think they would vote today. That said, Nate Silver’s models try to do something in between the two.

Anyway, to me it is interesting that it seems like we are voters are much more inclined to be driven be “mood swings”, while we as investors seem a lot more cool-headed. This is of course also what we could learn from Bryan Caplan’s The Myth of the Rational Voter.

PS note that I am not here discussing whether opinion polls are better or worse than prediction markets at forecasting the outcome elections. I am discussion the different decree of rationality we have as voters and investors (or consumers for that matter).

Advertisements
Leave a comment

2 Comments

  1. Larry

     /  October 18, 2016

    Is it possible that the “market” represents a qualitatively different population than the polls?

    Reply
  1. ラルス・クリステンセン 「『合理的な投資家』と『非合理的な投票者』 ~米大統領選挙の結果予測をめぐって~」(2016年10月18日) — 経済学101

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: