Theory.- The Directional p-Median Problem: Definition and Applications.- Bandwidth Tiered Service: Deterministic Demands.- Bandwidth Tiered Service: TDM Emulation.- Bandwidth Tiered Service: Stochastic Demands.- Economics.- Tiered Structures for Multiple Services.- Economic Model for Bandwidth Tiered Service.- Service Tiering As A Market Segmentation Strategy.- Quality of Service (QoS).- Tiered Service Bundling Under Budget Constraints.- Packet Scheduling.-...