Explore the concepts of efficiency and equity in this 50-minute lecture from MIT's Principles of Microeconomics course taught by Prof. Jonathan Gruber. Delve into important economic topics including socially optimal allocation, inequality, and sources of economic leakage. Learn how efficiency principles interact with equity considerations in economic systems and policy decisions. This lecture is part of MIT's Fall 2023 microeconomics curriculum and provides essential insights for understanding the balance between market efficiency and social equity goals.