Why this is mistaken
A comparative-advantage model can show that specialization and exchange enlarge the total feasible bundle for named parties. It does not allocate that bundle or include every affected person.
Repair the claim with a distribution ledger: identify parties, no-trade baselines, trade term, quantities, modeled gains, bargaining outcome, transition costs, implementation costs, and people outside the model. Then ask whether compensation is feasible, promised, funded, and actually delivered.
The corrected conclusion may still find mutual gains for the modeled parties. It simply stops before asserting that aggregate potential is universal welfare.
Where to watch
When this mistake may appear
- Specialization increases combined output.
- A trade term lies between two opportunity costs.
- The prompt omits workers, suppliers, communities, transition, or contracting costs.
Check your work
Your work may contain this mistake if:
- Says every person must be better off because total output rises.
- Treats potential compensation as actual compensation.
- Ignores bargaining power and implementation costs when allocating gains.