@itsarpittrivedi have you tried inquiring from the institutes from the Ivy League about the Phd programme they hold?
I assume you know the difference between Phd and DBA.
I would have inquired from the institues themselves first to get the details of their programme.
Hope this helps.
Wanted to know about the right forum or blog where i can discuss about the phd program in US Universities. Currently holding 3 years of experience in SBI as an Assistant Manager and currently started phd in India however, to get more info. I need if you guys know any forum/blog