Before selecting the weights, name the question
An equal-contract mean and a pooled-volume average can both be exact. The leadership error begins when their different questions disappear behind the same familiar label.
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What changed: the observation, the definition or the claim?
A revised series should not rewrite its own publication history
The latest research values and the values a reader originally received are different facts. A publisher needs an intelligible account of both, with the reasons for revision left open to examination.
Read the essayWhen a category moves, ask whether the activity moved too
A revised industrial classification can change a chart without changing the firms beneath it. Supported mappings and unresolved attribution belong in the research account together.
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