看這篇。好像ED都有優勢啊。

https://www.ivycoach.com/2018-ivy-league-admissions-statistics/

Ivy League Colleges	Overall Accept. Rate	Regular Decision   Accept. Rate	Regular Decision Apps Accepted	Regular Decision Apps Received	Early Decision / Action Accept. Rate	% of Class Filled by Early Apps	Early Decision / Action Apps Rcvd	Early Decision / Action Apps Accepted	Expected Number of Students to Enroll	Total Apps Received	Total Apps Accepted
Brown	8.6%	7.4%	2,036	27,344	18.9%	37.4%	3,088	583	1,560	30,432	2,619
Columbia	7.0%	5.5%	1,641	29,654	19.7%	46.8%	3,298	650	1,390	32,952	2,291
Cornell	14.0%	12.3%	4,689	38,266	27.7%	41.5%	4,775	1,325	3,190	43,041	6,014
Dartmouth	11.5%	9.9%	1,751	17,618	27.9%	42.3%	1,678	469	1,110	19,296	2,220
Harvard	5.9%	3.5%	1,031	29,603	21.1%	n/a*	4,692	992	1,660	34,295	2,023
Penn	9.9%	7.3%	2,252	30,719	25.2%	53.7%	5,149	1,299	2,420	35,868	3,551
Princeton	7.3%	5.4%	1,225	22,787	18.5%	n/a*	3,854	714	1,308	26,641	1,939
Yale	6.3%	4.6%	1,200	26,182	15.5%	n/a*	4,750	735	1,360	30,932	1,935