This economics lecture podcast focuses on the role of government intervention in markets. The speaker begins by introducing the concept of market efficiency, explaining consumer and producer surplus, and then uses this framework to analyze the effects of price ceilings (using rent control as an example), taxes, and subsidies. The lecture then explores market failures, such as monopolies and externalities (illustrated with examples of pollution and the COVID-19 shutdown), arguing that government intervention can be justified to correct these inefficiencies. A key takeaway is the concept of deadweight loss, which represents the loss of economic efficiency due to market distortions. The lecture concludes with a problem-solving exercise for the students to apply the concepts learned.