<p>Columbia is certainly my first choice, but things prohibiting me from applying ED here (I want to take ACTs and SATs again), and thus have to apply RD. </p>
<p>How much does the ED help, and how can I convey my interest in Columbia in a way that the admissions people will see that Columbia is my number one choice during RD?</p>
<p>What's the point of this question? If you cannot apply ED, how is it going to affect your life to know whether (and by how much) you might have a better shot at getting in ED?</p>
<p>I agree. If you look at this from an entirely statistical point of view~, last year roughly 23% accepted ED (columbia college) while only ~9% regular. That's a significant advantage and I don't think in the case of Columbia, the ED applicant pool is at all significantly more "qualified' than the RD candidate base.</p>