Managerial Economics (NMBA 012) discusses key definitions in economics. It defines economics as dealing with the allocation of scarce resources to fulfill society's needs and wants. Economics can be defined from wealth, welfare, and scarcity perspectives. Managerial economics applies economic principles and analysis to business decision making. It differs from economics by focusing on micro issues within firms and helping management make optimal decisions. Economics has both positive and normative aspects and uses both scientific and artistic approaches. It has branches of microeconomics and macroeconomics.