This text deals with various aspects of game theory and their applications to economics and operational research related problems. It brings together the contributions of a wide spectrum of disciplines such as statistics, mathematics, mathematical economics and OR. The contributions include decision theory, stochastic games, co-operative and nonco-operative games. The papers in the volume are classified under five different sections. The first four sections are devoted to the theory of two-person games, linear complimentarity problems and game theory, co-operative and nonco-operative games. The fifth section contains diverse applications of these various theories. Taken together they exhibit a rich versatility of these theories and lively interaction between the mathematical theory of games and significant economic problems.