I may be taking up graduate study for a PhD in Business Studies. I will need a research area. What is better than having a research area of application of math in business. I am thinking to research on Energy Economics. But I have no idea what it is. I also have no idea what are the latest developments of Mathematics in Business, Finance and Economics. So, I hope fellow Brilliantants can offer some suggestions. I need to submit my research proposal by July 10, 2015. Hope that you people can help me.