Séminaire interne Malka Guillot, Professeur d'Economie

Le séminaire a lieu exceptionnellement mercredi !

18 novembre 2026
 

Historical data as a barrier to entry in AI markets: The role of human 

Malka Guillot

Résumé : Over the past two decades, ownership of the French daily press has become steadily more concentrated. Independent titles have been absorbed into large multimedia and non-media groups. We rebuild the full shareholder networks and ultimate owners of French national and regional dailies from 2000 to 2023, documenting 88 ownership changes. The buyers are almost always groups, and most transfers happen inside the multimedia segment. As a result, the six largest groups hold a growing share of titles and of circulation. We link these changes to press-card records covering the full roster of journalists. Using stacked and de Chaisemartin–D'Haultfœuille difference-in-differences designs, we find that a takeover cuts newsroom size by about five journalists. The loss comes mostly from editorial formatting jobs, especially copy editors, and is concentrated in high-circulation titles. We discuss what these changes in newsroom composition mean for news production and the quality of information.

 
Le séminaire a lieu à 11h30, au GAEL