Geodesic
The Nash equilibrium in multy-product inventory model
Contributions to game theory and management, Tome 7 (2014), pp. 191-200.

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In this paper game theory model of inventory control of a set of products is treated. We consider model of price competition. We assume that each retailer can use single-product and multi-product ordering . Demand for goods which are in stock is constant and uniformly distributed for the period of planning. Retailers are considered as players in a game with two-level decision making process. At the higher level optimal solutions of retailers about selling prices for the non-substituted goods forming Nash equilibrium are based on optimal inventory solution (order quantity or cycle duration) as a reaction to chosen prices of the players. We describe the price competition in context of modified model of Bertrand. Thus at the lower level of the game each player chooses internal strategy as an optimal reaction to competitive player’s strategies which are called external. Optimal internal strategies are represented in analytical form. Theorems about conditions for existences of the Nash equilibrium in the game of price competition are proved.
Keywords: game theory, non-coalition game, Bertrand oligopoly, Nash equilibrium, logistics. 
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Elena A. Lezhnina; Victor V. Zakharov. The Nash equilibrium in multy-product inventory model. Contributions to game theory and management, Tome 7 (2014), pp. 191-200. http://geodesic.mathdoc.fr/item/CGTM_2014_7_a16/

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