Published on May 20, 2025 Updated on May 20, 2025

Research focus


Mohamed Chaffai
Professor,
Sfax University


Patrick Plane
CNRS Director of research,
CERDI-UCA-CNRS-IRD

A haircut is more expensive in the United States than in Mali. However, this does not mean that Malian hairdressers are less productive or skilled. The price difference stems from higher productivity in tradable goods in the United States compared to Mali. This productivity gap spills over into the prices and wages of non-tradable goods. It is therefore essential to address this imbalance by aiming to equalize goods prices and account for international productivity differences in tradable sectors. This regulation —through the real exchange rate— can influence the development of the manufacturing sector and its contribution to value added.

Read the blog article in French

Article reference

Chaffai, M et P, Plane (2024). “Manufacturing and the real exchange rate: natural resource rents matter when measuring misalignments”, Applied economics, 1–21.



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