English to French Bus/Financial Economics Agriculture in Africa

Context

Multiplier effects.
Sometimes, it is argued that a VCA (Value Chain Approach) facilitates and encourages the identification of multiplier effects.
There is a convention in applied economics that multiplier effects are best analysed in the context of detailed research activities and should not be used in applied policy analysis to claim additional* benefits for public intervention*.
This convention does not deny that multiplier effects are important and should be analysed, but it is based on the experience that it is difficult to ensure the comparability of the data and methods used for assessing multiplier effects for different interventions.

I do not know how to translate this phrase. I am not even sure whether to use the term prestations or avantages, bénéfices.

I would appreciate your input and clarifications very much.