Contagion is a research area that focuses on the spread of economic, financial, social, or cultural phenomena through networks of interconnected agents or systems. This can include the spread of diseases, financial crises, rumors, trends, ideas, or behaviors among individuals, groups, or markets. Researchers in this area seek to understand the mechanisms and dynamics of contagion, as well as the factors that can either facilitate or impede its spread. Studying contagion can provide insights into the interconnected nature of complex systems and help identify strategies for mitigating its negative effects or harnessing its potential benefits.