The eligibility criteria for pursuing a Ph.D. is having a bachelor's and a master's degree. Ph.D. can be a long and draining journey because it might take you a while to publish your research papers and get them signed by your professor. By the time you will start pursuing your Ph.D. you are most likely to be in your mid-20s, so earning by then becomes a necessary thing to sustain your education. That is why a lot of universities offer stipends to students while pursuing their Ph.D. Here is a list of countries that offer stipends to their students while pursuing their Ph.D.
Norway
Average Ph.D. stipend (per annum): US54,935 US dollars
