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However, I would define economics as: the study of how individuals and groups make decisions with limited resources as to best satisfy their wants, needs, and desires. A more detailed definition and discussion is found in What is Economics?
Newcomers to economics often assume that economics is about money and resembles finance. But money is only a small part of economics. Economics, rather, is the study of how people allocate resources among themselves, and that makes it a social science. That viewpoint wasn't always accepted, and still isn't by some overly mathy economists today.