Thank you for using the Jiskha Homework Help Forum. Here are some Websites:
1. (there are papers to purcase, but you don't need to do that to see the subject matter in the paper): http://www.researchpapers.net/business23.htm
2. (Look at the Research Topics, listed at the left); http://www.tepper.cmu.edu/doctoral-program/fields-of-study/economics/phd-in-economics--research-topics/index.aspx
3. (ideas): (Broken Link Removed)
Some were ideas for MBA, Doctoral, High School = in any event, no one can guess better than you your particular interests. Once you pick a topic it will be easy to see if there is enough research on it.