If you're seeing this message, it means we're having trouble loading external resources on our website.
If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.
Main content
Unit 5: Consumer theory
About this unit
How do you decide what to produce or trade? How can you maximize happiness in a world of scarcity? What are you giving up when you choose something else (i.e., opportunity cost)?