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Rational Voters?

Posted on February 7, 2013September 29, 2021 by neilbendle

Whenever I hear someone say “rational” I worry. Everyone means a different thing. This is a problem as obviously you can’t discuss rationality without knowing what it is. Bryan Caplan uses his view of rationality to criticize democracy in The Myth of the Rational Voter (Caplan 2007). The book left me with mixed feelings. I love books that tackle major topics. I must say that democracy’s value is definitely that. Sadly, I can’t get past some significant problems. Most obviously what are rational voters?

Irrational Outcomes

Caplan discusses important points around aggregation and social systems. He’d argue these cause “irrational” outcomes. I’ll address these some other time. Most relevant here is the fact that his definition of the rationality of individual voters is confused. This is a central problem given he is trying to attack the “myth of the rational voter”. (I don’t blame only Caplan for this weakness in his logic. He is far from alone in this).

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Caplan discusses something he calls rational irrationality (Caplan 2007). The voters he describes don’t bother to learn economics. This is because any individual bears all the costs of an education in economics but can’t influence policy any more than the ignorant. Basically, Caplan complains that democracy doesn’t punish ignorance. The implication of this is that voters have no incentive to reduce their ignorance.

Rational Voters? Photo By Cottonbro from Pexels
Rational Voters? Photo By Cottonbro from Pexels

To Caplan voters are not bothering to learn when there is little value to learning. What should we call those who don’t incur pointless costs? Most would call them rational. Caplan’s problem seems to be that voters obey economic logic. They do this even if they don’t learn economic theory. If I understand Caplan’s argument correctly his problem with democracy is not that voters are irrational but that they are ignorant. This is because democracy gives them no incentive to learn. His problem is that voters are sensibly responding to the incentives presented them.

Rational Voters?.

So are voters rational? I guess that depends on what you mean by rational.

For more on rationality in politics see here.

Read: Bryan Caplan The Myth of the Rational Voter 2007, Princeton University Press

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