Selection Bias and Quality

Matthew Yglesias » Home Page: "in my experience women are better managers than men. And I think there’s a sound theoretical basis for expecting that to be the case. Back in the 1950s, African-American baseball players were on average much better than white players. Not, it seems, because blacks are “better at baseball” than whites, but because the nature of the integration process was that African-Americans had to clear a higher bar to make it into big leagues at all."