Economics is the study of using limited resources to satisfy needs and wants. Microeconomics focuses on separate parts of an economy, such as individual households or businesses, industries or the workforce. It analyzes the causes and results of their buying and selling behaviors. Macroeconomics deals with larger issues affecting an entire economy such as inflation, unemployment and economic growth. Most upper-level courses, such as International Trade and Finance, apply principles of both micro- and macroeconomics.