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Quelle modelisation pour la strategie des firmes integrees sur le marche intermediaire?

  • Avenel, E.

Dans les modeles d'oligopoles successifs, les firmes integrees se trouvent dans une situation particuliere, puisqu'elles realisent leurs profits a la fois sur le marche intermediaire et sur le marche final. En tant que firmes amont, en particulier, elles ont une incitation a offrir moins de bien intermediaire que leurs concurrents independants, a tel point que leur output optimal peut etre negatif. Face a ce phenomene, deux attitudes sont possibles pour le modelisateur, selon qu'il impose ou pas une contrainte de positivite de l'output. En fait, aucun de ces deux choix n'est parfaitement satisfaisant, car l'un exclut les achats strategiques et l'autre exclut la forclusion. Nous proposons ici une modilisation alternative rendant compte de ces deux strategies et fondee sur la possibilite pour les firmes integrees de s'engager sur la forclusion. Ce modele permet ainsi d'etudier le choix des firmes entre ces deux strategies.

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Paper provided by Université Panthéon-Sorbonne (Paris 1) in its series Papiers d'Economie Mathématique et Applications with number 98.24.

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Length: 13 pages
Date of creation: 1998
Date of revision:
Handle: RePEc:fth:pariem:98.24
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