‘What and why of microeconomics’ explains that microeconomics studies how consumers choose what goods and services to buy, how producers make decisions to meet these demands, and how the two sides interact. Mostly the transactions work fairly smoothly, but occasionally things do go wrong. Sometimes failures are drastic, like the gasoline shortages in the 1970s and the housing bubble and its collapse in the 2000s, so a basic understanding of microeconomics is important. When and how do transactions go well? When and why do they fail? What can be done if they fail? Information and incentive mechanisms to coordinate transactions and how prices work are the main subject matter of microeconomics.