<p>ed and scea predominantly affect admission rates and not yield statistics. while it is true that with ed, you get one hundred percent yield, it mainly allows the schools to fill seats in their incoming class and thus allows the school to lower their rd admissions rates. those students who are obligated to attend because they applied ed identified those schools as their first choice and would have accepted a place in the class even if there were no ed. therefore the effects of ed really have minimal impact on yield. yield is most often used to identify prevailing student thought on what a school is. the lower the yield, the higher the likelihood that the school is considered a safety by the majority of the students applying. any analysis that attempts to place any type of emphasis on the link between ed and yield is faulty. ed is used by schools to inflate their admissions rate (or technically, the schools lack of acceptance rate).</p>