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ier-theory-model

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Use when the model is the contribution for an International Economic Review (IER) manuscript and its assumptions, results, or comparative statics are not yet tight. Stress-tests load-bearing assumptions, generality, and the proof to IER's theory/structural bar; it does not write the proofs.

International-Economic-Review-Skills/skills/ier-theory-model/SKILL.md

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# Theory and Model Craft (ier-theory-model)

## When to trigger

- The model "works" numerically but you cannot say which assumption is doing the work
- Existence/uniqueness of equilibrium is asserted rather than proved, or relies on a knife-edge condition
- A referee suspects the headline result is an artifact of a functional-form or parametric choice
- The comparative statics are stated but the *sign* of a key derivative is not signed cleanly
- You are unsure the model is general enough — does the result survive perturbing the convenient assumption?

## Why theory is central at IER

IER tilts theory/structural, and for theory and structural papers the model **is** the contribution — so the bar is not "is the model plausible" but "is the result **tight and general**." A tight result names exactly which assumptions are load-bearing and shows the conclusion is not an accident of a convenient functional form. This is the difference an IER referee looks for between a paper that teaches a general lesson and one that re-derives a known fact under new notation.
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