Why this is mistaken
Market boundaries are analytical choices constrained by substitution, institutions, evidence, and the question. A convenient category can be too broad to preserve quality and contract differences or too narrow to include real alternatives.
Repair the claim with a boundary box: product and quality, buyer and seller sets, geography, period, currency, transaction stage, trading mechanism, legal setting, and included or excluded substitutes. Then test sensitivity to a plausible neighboring boundary.
The mistake has corrected the error when the same fact can be described under two defensible boundaries and the effect on the conclusion is stated.
Where to watch
When this mistake may appear
- A prompt says the market price or the industry without defining scope.
- Quoted, ordered, delivered, and recognized transactions use different records.
Check your work
Your work may contain this mistake if:
- Combines unlike products or channels without a comparability argument.
- Uses one company's sales region as the economic market by default.
- Treats a quote, completed exchange, and accounting amount as the same observation.