Economic policy is rooted in the belief that government should be involved in some, if not all, financial decisions regarding local, state, and national economies. Economic policy may refer to interest rates, tax policy, government spending, as well as economic development and trade policies.

The PhD is a doctoral degree, specifically called a "doctor of philosophy" degree. This is misleading because PhD holders are not necessarily philosophers (unless they earned their degree in philosophy!). That said, PhD recipients are able to engage in thought experiments, reason about problems, and solve problems in sophisticated ways.

Part-time learning allows one to obtain a degree or qualification even if one cannot attend school on a full-time basis. One can learn at one's own pace, gradually accumulating credits that count towards a final qualification.