This document provides an introduction to managerial economics. It defines managerial economics as the integration of economic theory with business practice to facilitate managerial decision making. It discusses how managerial economics uses economic analysis and modes of thought to analyze business situations and formulate policies. The document also outlines some key characteristics of managerial economics, its importance in business decision making, and the roles and responsibilities of managerial economists in areas like forecasting, market research, and production scheduling. Finally, it discusses concepts like decision making, optimization, and marginal analysis that are important tools in managerial economics.