Ciencias Informáticas Commerce MLSTP Pricing rules Allocation mechanisms Auction mechanisms Auction theories Backtracking Branch-and-cut Budget constraint Cortes locales Costs Incentive compatibilities Incentive compatible Lifting secuencial Logic and constraint programming New mechanisms Optimal allocation Optimal auction Optimization Packing Programación lineal entera Random processes Randomized algorithms Sponsored search auctions Strategic biddings branch-and-cut programación entera programación lineal entera