“…The effects of strategizing in markets and market-based auction mechanisms have been studied extensively over the past years [25,26,27,28,29]. For more general envy-free auctions, besides the multi-unit case, there has been some work on truthful mechanisms in the literature of envy-free auctions [7,30] for pair envy-freeness, a different notion which dictates that no buyer would want to swap its allocation with that of any other buyer [31].…”