我该何去何从？

9# snowfoxzc

what is this supposed to be?

1.Payback period
2.Net present value

I would use these two to justify whether I should study or not.

Money-wise, generally it seems that it is not a good choice.
http://www.economist.com/node/17723223
The disposable academic
    Why doing a PhD is often a waste of time

不要多想了,如果没有教书的打算,赶快回国找工作,尤其是你能够申请到较好的工作...