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.