Microeconomics studies individual behavior in the marketplace and not the economy or economic theories as a whole. In microeconomics, the decisions of individuals to buy and sell is examined in relation to the limited resources they may have. Most people, on a daily basis, are involved in making microeconomic decisions. Microeconomics is a critical subject to study for those interested in a career in finance and business. A study guide can prove invaluable for learning the material since the guide offers new information and the ability to review what may have already been learned in a formal or informal class setting.