Okay, so because he made unspecified errors in a book he cowrote years ago, we should not believe what some other social scientists have researched. After all, Murray has cited them!

but calling her a socialist is typical political name-calling.

Apparently you don't 'know who Barbara Ehrenreich is':

http://www.dsausa.org/about/structure.html

She is a a member of the Democratic Socialist party. Her Wikipedia page mentions that she's a socialist before it mentions that she's a writer! Calling her a socialist is like calling Obama a Democrat -- a radical redefinition of name-calling, though it does please me that merely identifying someone as a member of a leftist party is considered grievously insulting.