What is the Marshall-Lerner condition for devaluation to improve the trade balance?

The Marshall-Lerner condition: devaluation improves the trade balance if the sum of absolute values of export and import price elasticities exceeds 1. If both demand elasticities sum below 1, devaluation worsens the trade balance. Empirically, the condition holds in the long run (1–2 years) but the J-curve shows initial deterioration.

What tools does the IMF use to address currency manipulation?

The IMF's Article IV surveillance monitors exchange rate policies. Sustained one-sided FX intervention with large current account surpluses triggers Enhanced Engagement. The IMF cannot sanction members directly but increased transparency pressure has induced adjustments. The US Treasury separately maintains a currency manipulation watchlist with potential trade sanctions.

Currency War Competitive Devaluation Impact

Analyze the competitive devaluation game theory: calculate the export competitiveness gain from devaluation, the retaliation dynamics using the Marshall-Lerner condition, and the J-curve effect on the trade balance.

Principal ($)

Annual Rate (%)

Years

Compounding / Year

$ Finance Disclaimer: These calculators are for educational and illustrative purposes only. Results do not constitute financial advice. Consult a licensed financial advisor before making investment or borrowing decisions.

How It Works

Each component has a specific meaning:

Devaluation — The devaluation recorded for the scenario being assessed.
Retaliation dynamics — The retaliation dynamics recorded for the scenario being assessed.

Note: Interpret the currency war impact result against the thresholds and context described above.

How to Use

Enter the devaluation, retaliation dynamics for the scenario you are assessing. Analyze the competitive devaluation game theory: calculate the export competitiveness gain from devaluation, the retaliation dynamics using the Marshall-Lerner condition, and the J-curve effect on the trade balance. Use the currency war impact result to inform your calculation.

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