[nicoburns]

I don't think that's the whole story here. It's also that universities don't tend to value teaching, and won't pay good teachers the same that they pay good researchers. That's not market dynamics, that's a cultural decision around where to allocate resources.

[sgillen]

It is also a financial decision, good researchers can pull in large grants, providing the school lots of money.

[urthor]

It's absolutely market forces.

Research output determines rankings. Teaching quality doesn't.

[WalterBright]

It absolutely is market dynamics, i.e. supply & demand.