KnowraEnvelope theoremLinked fromLinked fromThe 5 pages that link to Envelope theorem, each with the reason it gives.All 5Related 4Narrower topic 1Comparative staticsRelated: It simplifies comparative statics of maximized utility, profit, and cost.Shephard's lemmaNarrower topic: It supplies the derivative logic behind the lemma's equality.Cost curveRelated: The long-run average-cost curve can be understood as an envelope of short-run curves.Hotelling's lemmaRelated: It explains why derivatives of optimized profit reveal choices without tracking how choices change.Roy's identityRelated: It explains why derivatives of optimized utility encode choices without differentiating the choice rule itself.