The paper by R. Buyya, D. A. Abramson, J. Giddy, and H. Stockinger discusses the challenges and solutions for resource management and scheduling in Grid computing environments, particularly in the context of Peer-to-Peer (P2P) and Grid computing. The authors propose a computational economy framework to address the complexities arising from the geographic distribution of resources owned by different organizations or peers. This framework includes mechanisms for optimizing resource allocation through trading and brokering services. The paper explores various economic models such as commodity markets, posted prices, tenders, and auctions to determine the value of resource services based on supply and demand. It also outlines the necessary infrastructure, including interaction protocols, allocation mechanisms, currency, secure banking, and enforcement services. The authors discuss existing technologies that support these services and demonstrate the effectiveness of economic models in resource trading and scheduling using the Nimrod/G resource broker on the World Wide Grid (WWG) testbed, which spans five continents.The paper by R. Buyya, D. A. Abramson, J. Giddy, and H. Stockinger discusses the challenges and solutions for resource management and scheduling in Grid computing environments, particularly in the context of Peer-to-Peer (P2P) and Grid computing. The authors propose a computational economy framework to address the complexities arising from the geographic distribution of resources owned by different organizations or peers. This framework includes mechanisms for optimizing resource allocation through trading and brokering services. The paper explores various economic models such as commodity markets, posted prices, tenders, and auctions to determine the value of resource services based on supply and demand. It also outlines the necessary infrastructure, including interaction protocols, allocation mechanisms, currency, secure banking, and enforcement services. The authors discuss existing technologies that support these services and demonstrate the effectiveness of economic models in resource trading and scheduling using the Nimrod/G resource broker on the World Wide Grid (WWG) testbed, which spans five continents.