Research Articles: G. Carlier, Duality and existence for a class of mass transportation problems and economic applications, Charles Castaing and Ahmed Gamal Ibrahim: Functional evolution equations governed by m-accretive operators, Leonid Hurwcz and Marcel K. Richter, Implicit functions and diffeomorphisms without C, Leonid Hurwicz and Marcel K. Richter, Optimization and Lagrange multipliers: Non-C1 Constraints and minimal constraint qualifications, Takao Fujimoto, Jose A. Silva and Antonio Villar, Nonlinear generalizations of theorems on inverse-positive matrices, Shigeo Kusuoka, Monte Carlo method for pricing of Bermuda type derivatives.- Historical Perspectives: Isao Mutoh, Mathematical economics in Vienna between the wars.- Subject index.