Tatsächliche Eingabe
- Concept and source
- Opportunity cost. Course definition: value of the next best alternative forgone when a choice is made. It can include non-monetary alternatives. Tutorial example: a train with a lower ticket price may have higher opportunity cost if it causes two hours of lost paid work.
- Learner levels
- Level 1: 12-year-old familiar with choosing between weekend activities. Level 2: first-year economics student preparing short exam explanations. Level 3: new manager comparing employee time allocations and needing to avoid double counting accounting cost and forgone work.
- Explanation rules
- Use 'next best alternative' at every level. Do not say opportunity cost equals all rejected alternatives or always equals money. At Level 2 distinguish it from sunk cost only briefly; at Level 3 mention perspective and scarce resource. No equations required.







