Entrée réelle
- Study material
- [L4 s3] Opportunity cost is the value of the next best alternative forgone; it may be non-monetary. [L4 s5] A sunk cost is already incurred and unrecoverable; it should not affect a current marginal choice. Example: a non-refundable £30 ticket should not determine whether an ill person attends. [L4 s7] Marginal analysis compares additional benefit with additional cost for one more unit. Notes state continue when MB>MC. [Tutorial Q2] Choosing a cheaper train can be costlier when two hours of lost paid work are included.
- Learning objectives and assessment
- First-year economics. Learners must distinguish the three concepts and apply them to short scenarios. Exam uses multiple choice and 2–3 sentence explanations. Do not assess the missing MB=MC assumptions.
- Question design
- 6 items: 2 multiple choice, 2 short answer, 1 error diagnosis, 1 application. Easy/medium/hard = 2/3/1. About 15 minutes. Questions first, answer key after a divider. English.







