Economics

They are as follows:
- For economics
(1) Delhi School of Economics, Delhi University
(2) Shri Ram College of Commerce, Delhi University.
- For statistics,
Indian Statistical Institute, Kolkata. They conduct national level test every year. For more details and procedures, visit the respective websites of above colleges. All the best.

Go for USA, that's better.

The HDI was calculated in 2010 using the following indicators:
Health - Life expectancy at birth.
Education - Expected years schooling for school-age children and average years of schooling in the adult population.
Income - Measured by Gross National Income (GNI) per capital.

You can opt for any 1 year banking courses as that will help you in future job prospects.

The combination is good. Both, the subjects are viable in the present day aspirations. Both may fetch jobs, or further prospects.

The Master of economics is a postgraduate Master's degree in economics comprising training in economic theory, econometrics or applied economics.
I won't suggest you to pursue it along with M.Tech because both these courses are too tough to be done together. Either do M.Tech or MA.
Below mentioned are the top colleges of pursuing MA are:
1. Indian Statistical Institute - Kolkata / Delhi
2. Delhi School of Economics – Delhi.
3. Indira Gandhi Institute of Development Research – Mumbai.
4. Madras School of Economics – Madras.
5. Gokhale Institute of Politics and Economics – Pune.
6. UPES – Dehradun.

MA in economics will not be difficult for you. You should definitely go for it.
Below mentioned are the top colleges to pursue MA in economics are:
1. Indian Statistical Institute - Kolkata / Delhi.
2. Delhi School of Economics – Delhi.
3. Indira Gandhi Institute of Development Research – Mumbai.
4. Madras School of Economics – Madras.
5. Gokhale Institute of Politics and Economics - Pune
6. UPES – Dehradun.