This course aims to introduce recent advances in modeling behavioral biases and incorporating them into economic applications. The course will focus on applications in I.O. and in political economy and will consider biases such as sampling-based reasoning, limited attention, and belief and causal misspecifications. In particular, we will discuss a recent literature that proposes a theoretical framework for incorporating the notion of narratives into economic models. The course is aimed for a broad range of students who are interested in studying - both theoretically and empirically - the implications of behavioral biases to questions in fields such as industrial organization, public economics, development, health economics, and political economy.