In this course, you will learn the fundamentals of how to model the behavior of economic agents and their interactions through markets. We will cover the core of the conceptual framework at the heart of most of economics of competitive markets, namely (1) choice theory, (2) consumer’s choices, (3) classical demand theory, (4) choice under uncertainty, (5) the existence of a general equilibrium in and Arrow-Debreu economy of competitive markets, (6) its efficiency properties, the First and Second Welfare Theorems, (7) trading in sequential markets, Radner equilibria in sequential markets economies with financial assets, incompleteness of markets, (8) infinite horizon economies with either “infinitely-lived” agents or dynasties, or (9) with a sequence of overlapping generations of households.