IB Economics SL Internal Assessment Example

The student included two relevant diagrams that are accurately constructed and clearly labelled.

The student's diagrams distinguish the market outcome from the socially optimal outcome very well.

The student used the tax diagram effectively to show the tax wedge, the fall in quantity, and the remaining welfare loss.

A small amount of the diagram explanation could be even more explicit about tax incidence.

One or two labels could be phrased more carefully for maximum precision.

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

Key terms such as negative externality, allocative efficiency, welfare loss, indirect tax, and price elasticity are integrated into the student's explanations.

The student's terminology is mostly precise and supports the argument rather than appearing as a list of definitions.

A few phrases could be made more technically precise.

Some wording around elasticity and labour-market effects could be tightened for accuracy.