People with higher intelligence are more likely to see the world analytically as some complex (optimization?) system. People with lower intelligence will just say "invisible hand" and "free market" and write articles about how people who "get it" share certain political views.

Huh, I don't understand.There are so many economists with conflicting views. Do they imply free market economists are smarter than the others?

The research is probably accurate but not surprising for an economist to discover this. Confirmation bias at work I suspect.

strange, I find many economists dogmatic and heartless.