Interest in game theory has grown, beyond economics to the other social sciences. Games players
following rules for payoffs are ancient, in both their recreational and serious forms. A gambler in the
Wild West may win at poker and lose a gunfight. Understanding the rules of the game and their proper
application has behavioral consequences. More generally, important aspects of social and political
behavior may be explained or predicted. With respect to the formal study of game theory, our series has
published one paper: an introduction by Zagare (Game Theory, No. 41). The work at hand builds on
that earlier effort and covers current topics in the field. The treatment is at an intermediate level,
generally focusing on the problems encountered in moving from normal form to extensive form games.
Three kinds are explored: imperfect and incomplete information games, repeated games, and N-player
games