Where did those teaching in "top" law schools go to law school?

You can guess the answer, but I recently came across this systematic study by law professor Eric Segall (Georgia State) and a political scientist.   Faculty at the top ten law schools graduated from the following law schools (I'm going off a graph in the paper that is a little hard to read):   Yale (more than 190); Harvard (a bit less than 190); Chicago (more than 40); Columbia (more than 30); Virginia (not quite 30); Stanford (about 25); Berkeley and NYU (a bit more than 20); Michigan (not quite 20); Penn (fewer than 10).  Bear in mind that Harvard graduates more than 2 1/2 times as many students each year as Yale, Chicago, or Stanford.  If we normalize for the size of the typical Harvard class, then the figures would be something like this (with rounding to nearest ten):  Yale (480); Harvard (190); Chicago (110); Columbia (60); Stanford (60); Berkeley and Virginia (50); Michigan and NYU (30); Penn (20).