How many people are likely to drink and drive?How many people buy beer?

Using Microeconomics to Understand Markets and Predict Changes
One reason for studying microeconomics is to better understand how markets work and to predict how various events affect the prices and quantities of products in markets.
For example, how would a tax on beer affect:
1. The price of beer?
2. How many people buy beer?
3. How many people are likely to drink and drive?

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