We study second price auctions with weakly asymmetric interdependent values where bidders' signals for the value are independently and identically distributed. We also prove an asymptotic revenue equivalence among all standard auctions with weakly asymmetric interdependent values.

We study private-value auctions with a large number of bidders. We calculate approximations of the equilibrium bids and the seller's revenue in first-price auctions regardless of whether the bidders are symmetric or asymmetric, or risk-neutral or risk-averse. Furthermore, we show that...