<p>Take a statistically significant number of students from the same socioeconomic backgrounds with substantially similar grades and test scores who were admitted to the same colleges as each other to study the same majors. Sort by which college they actually choose to attend, correcting for the effect their net cost has on their college selection. In other words, control as much as possible to isolate the effects of their choice of college. Then follow them over their entire lives and see if there is any measurable impact of choice of college on their careers, family, health, income, etc.</p>
<p>That is a study I would be very interested in seeing.</p>