MENTAL MODEL · M3194

J-Curve Effect

DecideHigh supportDecision Science

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Version 1.0.0 · Updated 2026-07-30

CORE DEFINITION

Describes the dynamic path of the impact of currency depreciation on the trade balance. After depreciation, the trade balance initially worsens (due to rising import costs and lags in contract adjustment), then gradually improves over time as quantities adjust, forming a shape similar to the letter J.

SCAFFOLDING EFFECT

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Policy effect timing prediction. Explains why the positive effects of currency depreciation take time to materialize. In international business decisions, it helps enterprises arrange import and export timing reasonably after exchange rate changes, predicting short-term pain and long-term improvement in the trade environment.

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Describes the dynamic path of the impact of currency depreciation on the trade balance. After depreciation, the trade balance initially worsens (import costs rise, contract adjustments lag), then gradually improves as quantities adjust, forming a J shape. The mechanism is the time lag of policy effects—price contracts are rigid in the short term, quantity adjustments take time, so positive effects appear with a delay.

MINIMUM ACTION

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Practice this model in one real situation:

(As prediction and patience management, not a process)
Expect short-term deterioration of the trade balance after depreciation
Reserve a policy time lag window
Arrange import and export pace to cope with short-term pain
Monitor whether long-term improvement occurs.

Check to track your progress (stored locally)

Learning progress0%

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Source support: Explicit

link
en.wikipedia.orghttps://en.wikipedia.org/wiki/J_curveZH · Explicit
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