A sales position involves the give-and-take between consumers and industries as well as trade between nations. This academic field concentrates on teaching marketing and economics to understand what drives market demands and how to supply goods while strengthening the growth of a business.

Available at universities around the world, a PhD degree is an excellent choice for students who wish to pursue a career in academia or research. This type of degree is the highest qualification available in many fields and requires a great deal of study to obtain.