The goal of this course is to provide students with working knowledge of some of the main concepts and techniques of economic theory, emphasizing those that have a more direct application to business studies. In the first part of the course, we will focus on classical theories of consumer and producer behavior and on models of competitive equilibrium. After extending the theory of individual behavior to contexts involving uncertainty and time, the second part of the course will deal with strategic interaction. First, we will study the basic concepts of game theory, and then one of the main economic applications of the theory: the analysis of markets with imperfect competition. We will conclude the course by introducing the basic principal-agent model. While the previous topics focus on interactions in the market, this topic will allow us to analyze what happens inside the organizations that operate in those markets.