Level of research
Research can be done without having a postgraduate degree. Depending on the level of research you want to do, a research can be conducted at an undergraduate level satisfactorily. One can be a research assistant with a graduate degree or a research associate with a master’s degree. However, if you want to join the ranks of being a research fellow or scientist, then a postgraduate degree is necessary. At this level, you command greater research skills to produce better quality work, that will ensure postgraduate pay for the level of work that you are doing.