The evaluation of authors rank in thesis titles depends on different title evaluation institutions and different disciplines. The first author is the most important contributor and is considered as the most valuable ranking. Other authors can also make important contributions to the paper, and ranking is not the only criterion. Correspondents are also considered to be very important in some professional title evaluation institutions and disciplines, and they are the leaders and mentors responsible for the whole research project. Some institutions will also consider the author's contribution before publication, such as research design and data analysis.