Science and Policy

This means that economists practice both:

• Positive economics, which uses the scientific method to uncover the mechanism of the economy, seeks to describe the way this world IS.


• Normative economics, which recommends policies suggested by scientific knowledge to "fix" the world, seeks to prescribe the way the world SHOULD BE.

Description versus Prescription

• Positive economics uses the scientific method to uncover the mechanism of the economy, to lay out the rules, to take it apart and see how it ticks. Positive economics seldom has room for debate. Either it is or it is not. Just the facts, facts which can be verified.


• This is not true for normative economics--the policy side of economics. While positive economics seeks to describe the way it is, normative economics seeks to prescribe the way it should be. Normative economics is used to recommend ways to change the world, to improve it, to make it a better place.


• There is a lot of room for debate over normative economics and what constitutes a better world. A better world for Pollyanna Pumpernickel, might not be a better one for Winston Smythe Kennsington III. In most markets. a better world for sellers is higher prices, while a better world for buyers is lower prices. There are no absolutely right or wrong normative actions.

Working Together

Positive Economic Statements

1. An increase in the price of wheat to $5 a bushel gives farmers a higher living standard and helps save 1,000 family farms.
2. The United States spends $10 billion more on national defense than on higher education.
3. A market-based economy has less income inequality that other economic systems.

Each of these statements can be, in principle, verified by comparison with real world data.

1. To verify statement (1) wheat prices can be checked to see if they did, in fact, increase to $5 a bushel. Farmers' living standards (measured with something like per capita income) can then be examined to see if they have increased and whether or not 1,000 family farms that might have gone out of business are still operating. Verifying this statement can be quite involved, requiring sophisticated statistical procedures. However, the fact that it can be verified, at least in principle, is what makes it a positive statement.
2. Statement (2) is much more easily verified by checking how much was spent on national defense and how much was spent on education.
3. Statement (3) can also be easily verified by examining measures of income inequality, such as the Gini coefficient, for a range of economic systems.