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How to think like an economist
Use self interest to motivate yourself and others.
When acting on just about anything, people will seek their own benefit. As a result, you shouldn't be ashamed to use self interest to motivate others or to act to benefit yourself.
People will push back or resist doing things if they don't see a benefit in completing the action. For example, your employees won't work longer or harder unless they get compensated (or realize another type of benefit).