BRYAN CAPLAN
May 7, 2013
Keynesian Bets: What's Out There
May 6, 2013
Keynesian Bets Bleg
May 6, 2013
The Pyramid of Macroeconomic Insight and Virtue
May 2, 2013
A Natalist Provision
May 1, 2013
I Was a Teenage Misanthrope
DAVID HENDERSON
May 5, 2013
John Thacker on Vaccinations and the Sequester
May 3, 2013
Chef Rudy's Virtues Project
May 2, 2013
My take on Reinhart and Rogoff
May 1, 2013
Medicare Kills a Program


I have not followed the case, but is there any chance that it was ethnic voting in SC primary? Maybe they knew the other candidate was white and black voters guessed from the name that "Alvin Greene" was likely black?
The Alvin Greene story basically tells you noting about "irrational voters." In fact, it is quite likely it is a story of perfectly rational voters!
Think about it. Any democratic opponent has basically a negligible probability of defeating DeMint in the general election. Why would anyone invest any of their time learning about the primary candidates since it's irrelevant who is nominated? This is more likely a story of voter rationality - not irrationality. Voters did a cost-benefit analysis and realized that investing their time to learn about the candidates wasn't worth it since it didn't matter who was running against DeMint. Most just picked the first name because they didn't care - because it didn't matter. One could ask then why did they show up in the first place? My guess is that in all likelihood, many of the Democrats showed up to the primaries to vote for candidates in more local elections (e.g. governor, attorney general, house of representatives etc.) where they believe there was a more meaningful chance of winning.
Of course, maybe my story is wrong and voters are just idiots. But I think the rational voter story I just told is far more plausible since if voters were actually this dumb, you'd see these errors far more often.