MBA/PGDM

You can go for Masters degree or an MBA, right after an economics undergraduate is a great way to pave a path for a successful career. A higher education degree would enable you to get high paying jobs, particularly in MNCs and KPOs in the private sector. Or a Ph.D. in Economics after your undergraduate can provide you a wonderful platform to apply for high-level research and teaching jobs, not to forget the high pay scales that come along with them! And it makes perfect sense for you if you feel passionate about the subject or feel inspired by people like Amartya Sen or If Corporate Law is your area of passion, then it is not too late if you have an economics degree. A Bachelor in Economics followed by an LL.B. And you are set to become the next Harvey from Suits. You know you've thought of it - well, it's actually attainable. Hope this helps.

In my personal opinion, it would be best to opt for B.Tech+M.Tech. The added advantages that you get here are as follows:-
1. Your post graduation will take 1 year less. Everything will be finished in 5 years whereas if you opt for post graduation afterwards, it will take 1 year extra. Also, what guarantee is there that you will be able to prepare for your post graduation entrance during 3rd year and get your desired college.
2. Also, a company will always be willing to give you a better position if you are a post graduate. So, what you will get as an added advantage of M.Tech degree is fabulous job, with a great position. I know it is a tough task to pursue B.Tech and M.Tech together but it will be fun. Remember that the best and luckiest warriors are designed for the toughest tasks to unleash their true strength. So, go for Integrated Course and all the best.