We analyze the preferences of a risk-averse seller over the class of "standard" auctions with symmetric and risk-neutral bidders. Assuming that buyers' private signals are independently distributed, we find that a sealed-bid first-price auction with an appropriately set reserve price is...

The buyer solicits bids from suppliers with different cost distributions defined by their capacities. The expected market share of each supplier is the ratio of its capacity to the industry capacity. The buyer's optimal reserve price declines with increases in the concentration of the industry....