human: Given a node-centered hypergraph: <hypergraph>, where nodes represent authors and hyperedges represent groups of authors who co-authored the same paper.

Details of the hypergraph:
Center node: "A Multi-Tier Negotiation Protocol for Logistics Service Chains"
  Abstract: Logistics service chains are characterized by multiple service providers contributing to the provision of a composite logistics service to a customer. In particular, various contractual dependencies exist across service chain levels. The object of our research is resource allocation which has to consider these dependencies to avoid overcommitment and overpurchasing. We propose a multi-tier negotiation protocol for solving this problem. The proposed artifact is developed from an interaction protocol engineering perspective in accordance with the design science paradigm. First evaluation experiments show that the protocol prevents overcommitments and overpurchasing, leading to higher expected profits for logistics service providers.

Connected through hyperedge HE-1 (induced by source paper "Combinatorial auctions for supply chain formation"):
  with members:
    - "i Bundle: an efficient ascending price bundle auction"

Question: Please tell me which research area the center author belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Computer science