Give your next hour a job.
The opportunity cost of a choice is the value of the best alternative forgone. It can be time, knowledge, money or another outcome that matters to you.
Inside this model
The frontier plots earnings = wage × work hours against learning output = productivity × sqrt(8 − work hours). Moving toward more earnings leaves less learning time. Units are distinct; the chart does not claim they are equally valuable.
Out in the world
A practical use
Choosing a freelance project uses hours that could go toward a course. The right choice depends on how you value both outputs, not only on the cash offered.
A useful lens. Not a universal law.
- The day is fixed at eight hours and learning has diminishing returns. Rest, deadlines and future benefits of learning are outside this one-day model.
Further reading
Explore the original research or the teaching reference behind this experiment.
OpenStax — Production possibilities and social choices ↗