By introducing the concepts of implicit coalitions and conáict of interests in a multiple-player context, this paper generalizes some theorems on policy invariance and equilibrium existence and uniqueness for LQ policy games.
Acocella, N., Di Bartolomeo, G., & Piacquadio, P. G. (2009). Conflict of interests, (implicit) coalitions and Nash policy games (Working Paper of department of communication of University of Teramo 54). https://hdl.handle.net/2078.5/34909