I think this would be something you should ponder and think about on your own. Think of a question that you would like to answer (eventually) and more important

I think this would be something you should ponder and think about on your own. Think of a question that you would like to answer (eventually) and more importantly your dissertation reviewers would like to know about. It doesn't necessarily have to be a tough topic but has to hold interest. Something that fancies me right now is impact of behavioral economics on business policies