The 8th Stony Brook Summer Festival on Game Theory

We introduce a new class of game forms called effectively rectangular game forms. An effectively rectangular game form is one that has the same effectivity function as some rectangular game form. Actually we extend this class a little more: we define a superdeterminate game form as one that has an effectivity function which is finer than that of a rectangular game form. We prove that a tightly superdeterminate game form, hence a tight effectively rectangular game form, is Nash solvable. ∗Université de Paris-I, France Quasi-Competitiveness and Profitability in Symmetric Cournot Oligopoly Rabah Amir∗ (joint w/ V.E. Lambson†)