The  "Public and Political Economy Day at ENS Lyon" (PPD @ ENSLyon) workshops of the GATE research lab are held at ENS de Lyon and are organized by Mathieu Couttenier, Jonathan Goupille-Lebret, Sophie Hatte and Laurent Simula.

Their ambition is to create new synergies by promoting exchanges between researchers in public economics and political economy. Each edition is devoted to a specific theme and brings together internationally recognized researchers in Lyon. The workshops are open to economics students, enrolled in the master's and PhD programs of ENS Lyon, and thus contribute to the research-based education ENS de Lyon aims to promote.