Economics is a social science that studies the production, the distribution and the consumption of goods and services. It analyses how the individuals make decisions, how they interact and how institutions and incentives influence their behavior. The aim of this matter is to set the bases of a rigorous language and transmit the basic economic knowledge so that the student learns to think like an economist. The program of the subject offers a panoramic view of the main ideas that are repeatedly used in economics such as opportunity cost, decision making in marginal terms, the role of incentives, the efficiency of market allocations, and so on, up to ten basic principles that shape the foundations of economic analysis.