IB Economics HL Internal Assessment Example

The student included two relevant diagrams that are clearly tied to the policy issue in the article.

The first diagram is accurate, correctly labelled, and helps show the welfare loss from overconsumption.

The student's diagrammatic choices show good understanding of market failure and government intervention.

The second diagram contains substantive inaccuracies in the tax representation.

The tax wedge, incidence, and revenue effects are not shown clearly enough.

The explanation of the second diagram is limited by the diagram’s errors and does not fully justify the outcomes the student claims.

The student uses relevant economic terminology consistently and appropriately throughout the commentary.

Terms such as negative externality, market failure, Pigouvian tax, welfare loss, PED, and socially optimal output are integrated into the argument rather than listed mechanically.

The student's terminology helps structure the analysis and shows clear subject knowledge.

Some terminology is applied in a slightly overconfident way when the analysis is not fully established.

A few points would benefit from sharper distinctions, such as between consumer burden and producer burden.

The vocabulary is strong overall, but precision could be improved when discussing how the tax affects market outcomes.