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: "Low-Revenue Equilibria in Simultaneous Ascending-Bid Auctions"
  Abstract: Low-revenue equilibria allow participants in an auction to obtain goods at prices lower than would prevail in a competitive market. These outcomes are generated as perfect equilibria of ascending-bid, multiunit auctions. We show that these equilibria are possible under mild conditions-conditions that are likely to prevail in many situations where auction formats have recently been adopted. We argue that these equilibria could explain the low revenues of some recent auctions, and discuss potential remedies to eliminate low-revenue equilibria.

Connected through hyperedge HE-1 (induced by source paper "Bid Rotation and Collusion in Repeated Auctions"):
  with members:
    (none)

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: Psychology