Joint research unit 7235

Noncooperative oligopoly equilibrium in markets with hierarchical competition

Ludovic A. Julien

This paper deals with the existence of a non-cooperative sequential equilibrium in interrelated markets with heterogeneous atomic traders. Since this model features a rich set of strategic interactions, there are two kinds of problems associated with the existence of equilibrium. First, existence and uniqueness of followers’ strategies are not guaranteed. Second, the no-trade equilibrium is always an equilibrium outcome. To overcome these two difficulties we consider a differentiable approach. We show that the set of equations which determines the strategies of followers is a variety with the required dimension, i.e. the vector mapping which defines this set is a local C²-diffeomorphism. The continuous differentiability of followers’ strategies is critical for the existence of an interior equilibrium. Unlike the simultaneous move games, exchange can take place in one subgame while autarky can hold in another subgame, in which case only leaders (followers) make trade. Some examples buttress the approach and discuss the assumptions made on the primitives.

AGENDA

Monday 27 June 2022

Law, Institutions and Economics in Nanterre (LIEN)

Miriam Buiten (St Gallen Univ)

En distanciel à 11H30

From intermediaries to moderators of the internet: Should online platforms be liable?

Monday 27 June 2022

Law, Institutions and Economics in Nanterre (LINK)

Miriam Buiten (St Gallen Univ)

En distanciel à 11H30

From intermediaries to moderators of the internet: Should online platforms be liable?

Thursday 30 June 2022

Doctorants

Zoltán Szücs | Gagnie Pascal Yebarth

Salle 401-402

Le rôle de la police municipale dans la satisfaction des attentes de la population parisienne en termes de tranquillité publique | Politiques publiques et externalités dans les jeux stratégiques de marché

Thursday 30 June 2022

PhD students

Zoltán Szücs | Gagnie Pascal Yebarth

Salle 401-402

Le rôle de la police municipale dans la satisfaction des attentes de la population parisienne en termes de tranquillité publique | Politiques publiques et externalités dans les jeux stratégiques de marché

Friday 1 July 2022

Colloques et Workshops

9th Workshop on Economic Analysis of Litigation

Friday 1 July 2022

Colloques et Workshops

9th Workshop on Economic Analysis of Litigation

Monday 4 July 2022

Colloques et Workshops

Joint Webinar on Environment and Health in Seaport Cities

Monday 4 July 2022

Colloques et Workshops

Webinar conjoint sur l’environnement et la santé dans les villes maritimes

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