Intuitively, we might think that a multiproducts company which has the possibility to forecast the structure of demand does not need to protect itself against risks of stock shortages due to the variability of the characteristics of demand since this becomes foreseeable. Symmetrically, it seems...

In two-player games with negative (positive) spillovers it is well-known that symmetric agents both overact (underact) at the Nash equilibria. We show that for heterogeneous agents this rule of thumb has to be amended if the game features strategic substitutability.

This paper develops a simple model in which a social hierarchy emerges endogenously when agents form a network for complementary interaction (``activity''). Specifically, we assume that agents are ex ante identical and their best response activity, as well as their value function, increases...

We address the problem of a planner looking for the efficient network when agents play a network game with local complementarities and links are costly. We show that for general network cost functions, efficient networks belong to the class of Nested-Split Graphs. Next, we refine our results and...

The beauty-contest framework of Morris and Shin (2002) is extended to allow sub-groups within the population of agents to differ in the quality (i.e. precision) of their private information. We discuss the inefficiency of the resulting model's equilibrium, and assess the relative effectiveness...