<p>@ucbalumnus:</p>
<p>Yes, but colleges generally have a grasp on the percentage of students who switch majors from what they intended and where they switch to so can plan for that. For instance, almost all the STEM fields have some attrition/bleeding away. Yale’s STEM attrittion rate isn’t different from Harvard’s or Stanford’s, but they traditionally haven’t admitted as high a percentage of kids intending to major in a STEM field as Harvard or Stanford.</p>