>Did they graduate in higher numbers? Did they have better career outcomes? Did more get into better(?) grad schools? What is their median income? Are they happier, did they enjoy college more?
And make sure you control for your inputs. It's harder for the #2 campus of state school to wring "good outcomes" from the children of plumbers and truck drivers than it is for big brand name schools that have plenty of kids of doctors and lawyers in there to drag their average up because even if you do a middling job educating them and have squat for industry connections they will still land internships and go on to get good jobs.
And make sure you control for your inputs. It's harder for the #2 campus of state school to wring "good outcomes" from the children of plumbers and truck drivers than it is for big brand name schools that have plenty of kids of doctors and lawyers in there to drag their average up because even if you do a middling job educating them and have squat for industry connections they will still land internships and go on to get good jobs.