Four essays on economic networks

Quatre essais sur les réseaux économiques

Lucas Vernet ()
Additional contact information
Lucas Vernet: ECON - Département d'économie (Sciences Po) - Sciences Po - Sciences Po - CNRS - Centre National de la Recherche Scientifique

SciencePo Working papers Main from HAL

Abstract: This dissertation lies at the intersection of two fields of research in economics that have recently substantially developed: on the one hand, the modeling and study of economic networks, and on the other hand, transport theory and its applications in economics. The four chapters of this dissertation present theoretical results in relation with these two topics and put stress on their connections. The first chapter models bipartite contracts on a decentralized market as an equilibrium flow problem. We prove the existence of a competitive equilibrium outcome and discuss its effciency. We interpret this equilibrium in the case of indivisible commodities. As an illustration, we build a model for the overnight interbank loan market with counterparty risk and collateralization costs. In the second one, written in collaboration with Alfred Galichon and Larry Samuelson, we prove a monotone comparative statics theorem that we then apply to several classical economic models (matching models, min-cost flow problems and hedonic models). The third chapter is a joint work with Alfred Galichon and Arthur Charpentier. It presents tools to solve for matching problems on large geographic networks before applying them to examples. Finally, the fourth chapter, written with Rakesh Vohra, shows how a monopolistic insurer can use externalities between agents - modeled as a network - to maximize his profit. We show that a monopolistic insurer decreases the welfare of all agents.

Keywords: Network; Flow; Monotone comparative statics; Externality; Réseau; Flux; Statiques comparatives monotones; Externalité; Modèles économétriques (search for similar items in EconPapers)
Date: 2019-01-24
References: Add references at CitEc
Citations:

Published in Economics and Finance. Institut d'études politiques de Paris - Sciences Po, 2019. English. ⟨NNT : 2019IEPP0006⟩

There are no downloads for this item, see the EconPapers FAQ for hints about obtaining it.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:hal:spmain:tel-03657458

Access Statistics for this paper

More papers in SciencePo Working papers Main from HAL
Bibliographic data for series maintained by Contact - Sciences Po Departement of Economics ().