Ph.D. in the field of management is a tough task as it acquires lots of research for the topic. I have worked with Ph.D. thesis writing services online and have seen many different types of topics related to the business management. Social Entrepreneurship is also a field of the subject in which you can have your thesis, second is corporate ethics, accountability, and responsibility, then, accounting and finance, human resources. Students have to choose those from the variety of topics which reflects research interest. If you do not get interested in your thesis topic, then you would never write it with full dedication and concern.