Can I do an economics degree after my undergraduation in mathematics?

Absolutely - but do not go for a second BS. Go directly for a Masters in Economics.

The undergrad in Math will be a solid foundation and more than prepare you for a Masters. You would take a solid step backwards if you went back for another undergrad degree.

yes u can do b.a economics and also m.a economics. afterwards u can take uion public service commission exam as an analyst. u r mathematical background will be helpful in economics. there will be a paper known as economitrics. based on maths. there is demand for economics people and they can join in reserve bank also. all the best.

Mathematics and economics are very strongly linked, and I would imagine you could pursue an economics degree without any hassle. Your best bet is to go to speak to your tutor, or someone equivalent at your university to ask them about it.

Yes, why not? You can go get a second BS. Most people don't want to do this because they rather just work. So, if you want to and have the time, go right ahead.

yes of course...i heard that those quant jocks (trader) working on wall streets are graduates of math or physics dept....