The traditional model of sequential decision making, for instance, in extensive form games, is a tree. Most texts define a tree as a connected directed graph without loops and a distinguished node, called the root. But an abstract graph is not a domain for decision theory. Decision theory...

This paper addresses the question of what it takes to obtain a well-defined extensive form game. Without relying on simplifying finiteness or discreteness assumptions, we characterize the class of game trees for which all pure strategy combinations induce unique outcomes. The generality of the...

This paper studies a general equilibrium model with an investor controlled firm. Shareholders can vote on the firm's production plan in an assembly if they dislike management's decision. Prior to that they may trade shares on the stock market. Since stock market trades determine the distribution...