This document provides an introduction to empirical food and nutrition security analysis. It outlines key concepts related to food security including the four dimensions of availability, access, utilization, and stability. It reviews global and country-level data on food insecurity, such as trends in undernourishment and child malnutrition. The document also discusses policy options and tools for measuring food security progress, including the Global Hunger Index. Finally, it provides an overview of the course structure for empirically analyzing food security issues.