Auctions have a long history, having been recorded as early as 500 B.C. [17]. Nowadays, electronic auctions have been a great success and are increasingly used. Many cryptographic protocols have been proposed to address the various security requirements of these electronic transactions, in particular to ensure privacy. Brandt [4] developed a protocol that computes the winner using homomorphic o...

This paper presents the design of an extended matchmaking component for electronic markets, which is able to identify negotiable agreements and the issues that are subject to the negotiation, in the case where basic matchmaking fails to find agreements that satisfy the constraints of the seller and the buyer. The foundation for this functionality is the introduction of negotiable constraints wi...

Early research in electronic markets seemed to suggest that E-Commerce transactions would result in decreased costs for buyers and sellers alike, and would therefore ultimately lead to the elimination of intermediaries from electronic value chains. However, a careful analysis of the structure and functions of electronic marketplaces reveals a different picture. Intermediaries provide many value...

We consider a revenue maximizing seller who, before proposing a mechanism to sell her object(s), observes a vector of signals correlated with buyers’ valuations. Each buyer knows only the signal that the seller observes about him but not the signals she observes about other buyers. The seller therefore has information about buyers’ valuations that is not common knowledge. How will the seller di...

This paper analyzes seller characteristics and choices in approximately 1000 eBay auctions for a particular model of PDA. Seller characteristics include frequency of selling, reputation, and the qualities of the product sold. Seller choices include the length of the auction, information provided about the product, starting price, and whether to use a ‘Buy it Now’ option. We find that different ...

The Research on Buyer Legal Protection in the sale and purchase agreement through an electronic system aims to find out how validity of form legal protection buyers for losses due damage goods purchased electronic. By between seller buyer agreement, they have rights obligations. This research method use Library Method carried library, where data is obtained from availeble by reading, studying b...

A price-setting seller faces a buyer with unknown reservation value. We show that if the buyer is sufficiently risk averse, the seller can benefit from employing a Possibly-Final Offer (PFO) strategy. In a PFO, if the buyer rejects the seller’s initial offer the seller sometimes terminates the interaction. If the seller does not terminate, he follows up with a subsequent, more attractive offer....

In auctions where a seller can post a reserve price but if the object fails to sell cannot commit never to attempt to resell it, revenue equivalence between repeated first price and second price auctions without commitment results. When the time between auctions goes to zero, seller expected revenues converge to those of a static auction with no reserve price. With many bidders, the seller equi...