Microeconomics studies individuals and business decisions, while macroeconomics analyzes the decisions made by countries and governments. Microeconomics focuses on supply and demand, and other forces that determine price levels, making it a bottom-up approach.
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micro economic is factors affecting the operation of the business internally. It includes facts like customer suppliers etc. It is where the manager has control. Whereas macro is a study done externally. The factors affecting the business due to external factors where the manager has no control for eg natural disaster theft etc.