In order to determine your eligibility we must go through the eligibility criteria of the Ph.D. program offered by JNU Delhi. To get admission you must have a Master’s Degree/BE/B.Tech with 55% marks or equivalent Grade ‘B’ in UGC 7-point scale. There is no specific specialization mentioned that makes you eligible for admission to the Ph.D. in Economics program at JNU.
Furthermore, you will be invited for a viva voce examination. To be eligible for this you must secure the following marks out of 70 in the written examination for doctoral courses:
The final selection of candidates for admission to the doctoral programs of study is made on the basis of inter-se merit of candidates in their respective categories, based on their performance
No candidate is eligible for admission to the doctoral programs of study unless he/she secures the following minimum overall score which is 40% for the General Category, 36% for the OBC category, and 30% for SC/ST/PH.
Getting admission to MIT, Harvard or Stanford can be possible from ISI Delhi. It has a very good Economics Unit. However, the same cannot be said about ISI Kolkata and also MSQE, for that matter. Do not expect to get into MIT or Harvard or Stanford by studying in ISI Kolkata.
It goes without saying that you will have to have and maintain an excellent academic record to even be considered for admission to the institutes you aspire to study in. And you also must have a good reference with the faculty so that they can write letters of recommendation for you.
Ph.D. is different from other degrees in which you learn and take exams. During your Ph.D. you need a research guide who takes an interest in your work and is involved in active research in the same field as you.
Unless your guide is active in research, they can not guide you. Here research refers to publishable research in good journals.
Your field of research will determine the better option out of the two to pursue your Ph.D. in Economics. If say, you wish to work on Marxism/Communism or related topics, CESP JNU is the right choice for you. You will find ample assistance in JNU.
If you wish to work in Micro Theory such as on Contract theory or Industrial Organization, DSE will be the right option. There are more faculty members in DSE than CITD JNU who work in these areas.
If you wish to work on DSGE literature ( Macro), the guide will exist as a formality and you will be on your own for the most part. This field of research is not pursued by most in India and you will mostly have to rely on yourself.
Also, if you wish to work in the corporate after your Ph.D. , join DSE as it offers very good placements. JNU does not offer on campus placements. The economics at JNU though, is very enriching. There you will be exposed to a variety of subjects, debates, etc.
You must choose between JNU and DSE for your Ph.D. Economics, based on your personal preference and your field of research.