Euchre game variations their possession. Taking all five tricks here results in four points. Each player keeps their own score. A common variation played in southwestern England competitive pub leagues uses the standard Euchre deck with an extra card, usually a Joker or 2 of spades, called the "Benny" (often called the "Bird" in Australia). This card is the highest trump no matter what suit is called. When the Benny is turned over by the dealer, the dealer must choose a suit to call as trumps before looking at his or her hand. Bidding then proceeds normally. The Duchy of Cornwall lays claim
Common value auction The expected auctioneer's revenue is: Note that here, the revenue equivalence principle does NOT hold—the auctioneer's revenue is lower in a first-price auction than in a second-price auction (revenue-equivalence holds only when the values are independent). Common-value auctions are comparable to Bertrand competition. Here, the firms are the bidders and the consumer is the auctioneer. Firms "bid" prices up to but not exceeding the true value of the item. Competition among firms should drive out profit. The number of firms will influence the success or otherwise of the auction process in driving price towards true value. If the number of