ABSTRACT
Most evolutionary game-theoretic models that we have considered fall into the class of normal form games (see Section 2.1) with perfect information. In this chapter we consider two key departures from this structure which are still highly relevant to biological modelling. Firstly we consider games in extensive form. Although they apply to a wider class, such games can be most usefully thought of as modelling interactions where individuals make sequential decisions, so the second player can choose a strategy based upon the observed choice of the first player. Secondly we consider games where individuals do not have perfect information; either no player has perfect information, or some players do but others do not. Finally, we consider a type of game which can be thought to be both in extensive form and with imperfect information, repeated games.
