Examples abound in economics, politics and society where agents can enter partial cooperation schemes, i.e. they can collude with a subset of agents. Several constributions devoted to specific settings have claimed that such partial cooperation actually worsens welfare compared to the...

We consider a game where agents commit to action for two periods. This implies two different patterns of decisions: agents can synchronize or stagger their decisions. We compare the outcomes of both timing patterns, and show that spillovers and strategic interactions are crucial for such a...