I agree with Kong. Take some classes in both areas, and see which one you like better. You always have the choice of taking classes online later in life if you feel that you made the wrong career choice. I don't know how useful/beneficial it would be, but you could always try and get one of the degrees online over the summers between each semester. Here are two links to check out, one for an
accounting degree and the other for an
economics degree.
At the very least you should definitely take a few of each type of class to see which one you like better. Also, try talking to other people in the industry and find out what they did with their degrees. :-)
~A