<p>Every school I know of self-reports. The surveys tend to be pretty accurate for categorical factors like if the student is employed and how the student found the job, especially when completion of the report is required for graduation. </p>
<p>The 6-month after graduation surveys are more problematic. They’re mailed to students and tend to have a low response rate. The students that do respond tend to be the ones that want to brag.</p>