Individuals face limitations in their ability to process all relevant information and they are very sensitive to the way this information is framed. A growing literature on attention and perception in economics, psychology, and neuroscience has documented these "bounds" and "biases" and has begun to incorporate them into alternative models of decision-making and strategic interaction. This course reviews the evidence (from the lab and field) on individual departures from the standard economic paradigm, analyzes these phenomena with rigorous formal models, and discusses how these biases impact markets and allocations.