For the twentieth anniversary of Décisions Marketing, seven editors-in-chief of the journal, from the origin to nowadays, are sharing their vision of the future of marketing decision-making. Their analysis highlights the difficulty of conciliating efficiency and ethics objectives, internal and...

This paper investigates the structure of bilateral oligopolies - a simple version of Shapley Shubik games with two types of traders and two commodities. It shows that interior equilibria exist, studies the example of CES utility functions to uncover the relation between the complementarity of...