Student evaluations of teaching: unreliable and biased against female instructors (blogs.lse.ac.uk)

The original title is far too long to fit: Student evaluations of teaching are not only unreliable, they are significantly biased against female instructors.

Where does it present the data affirming these teachers would receive higher scores were they male? The authors declare that the voices of students polled is irrelevant and declare their own inference as fact. It's ok to accept that all the women teachers suck where the students were polled as it's not representative of all female teachers and even if it were, science means accepting data as collected. Unfortunately, opinion polls are rarely scientific in nature and are always biased by: -who is polled (even member cross-section amongst the same group) -when they're polled (did they have a shitty day?) -where they're polled (fine I'll answer so I can get to where I need at this moment.) And that's just off the top of my head.