Fall back equilibrium for <InlineEquation ID="IEq1"> <EquationSource Format="TEX">$$2 \times n$$</EquationSource> </InlineEquation> bimatrix games

In this paper we provide a characterization of the set of fall back equilibria for <InlineEquation ID="IEq4"> <EquationSource Format="TEX">$$2 \times n$$</EquationSource> </InlineEquation> bimatrix games. Furthermore, for this type of games we discuss the relation between the set of fall back equilibria and the sets of perfect, proper and strictly perfect equilibria. In order to do this we reformulate the existing characterizations for these three equilibrium concepts by the use of refinement-specific subgames. Copyright Springer-Verlag Berlin Heidelberg 2013