I have received offers from multiple research groups for my PhD. I have a friend who has also applied to PhD programs in the same field, and he has not even been invited to an interview, and it looks like he may get rejected by every school he has applied to. He is actually a very smart guy, smarter than me for sure, but I think maybe it's just that his application writing skills aren't very good? I was thinking...I am going to be declining a few offers of admission in favor of my desired program. Would there be any ethical dilemma if I tell the professors to whom I am declining the offer about my friend who is wanting to work on a PhD more than anything, and basically "put in a good word" for him? He has excellent grades and research experience, and I'm sure he can supply letters of recommendation, but the deadline has passed for admission and he's basically in a stroke of bad luck.