human: Given a hyperedge-centered hypergraph: <hypergraph>, where the center hyperedge groups authors who co-authored the same paper.

Details of the hypergraph:
Center hyperedge (induced by source paper "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.

Includes members:
  Member "Bid Rotation and Collusion in Repeated Auctions":
    also connected through other hyperedges:
      (none)

Question: Please tell me which research area the co-authored paper (i.e., the source paper of the center hyperedge) belongs to. The 4 classes are: Computer science, Mathematics, Engineering, Economics, Psychology, Business. Directly output the class name.

gpt: Psychology