<p>Note. First the acceptance rate for ED is higher because there is a smaller pool of applicants but they have better overall credential and demonstrated interest for the school as one can only apply to one ED. For RD, all those got deferred from other ED schools and those who were not ready for ED are applying. So there is a much larger pool of applicant. the acceptance rate is expected to be lower. One should decide on whether to apply ED based on his/her credential, financial affordability, and commitment to attend that particular school, not simply hoping to increase the chance of acceptance. If you are depending on the financial aid and need to compare different financial package, ED is not for you. If your credential is significantly below admission average particularly for a prestigious school, ED would not help your chance either.</p>