Abstract

http://ssrn.com/abstract=967736
 
 

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Auction Hosting Site Pricing and Market Equilibrium with Endogenous Bidder and Seller Participation


George Deltas


University of Illinois at Urbana-Champaign - Department of Economics

Thomas D. Jeitschko


Michigan State University - Department of Economics

March 2007


Abstract:     
This paper characterizes the payoffs and pricing policies of auction hosting sites when both the bidders' and the sellers' participation is endogenous. Sellers have heterogeneous opportunity costs and make a listing decision depending on the fee and the expected revenue from the sale. On the other side of the market, factors such as interface layout and prior bidding experience result in bidder heterogeneity with respect to participation costs. Bidders participate if their ex ante expected payoff from searching the site exceeds their participation costs. The auction site earns revenue by setting positive listing fees, trading off the increased revenue per seller resulting from a higher fee with the revenue reduction from the loss of sellers. Though this appears to be a classic monopoly problem, there are important differences. The reduction in the number of sellers participating in a site has feedback effects, as it affects the number of bidders who would choose to visit that site, which in turn again affects the attractiveness of the site for seller, and thus further reduces seller participation. In this environment, the monopolist's ability to extract rents is severely limited, even if one considers rent extraction from the seller side of the market only. It is demonstrated that the inverse demand curve is flatter than the demand curve obtained from the (inverse) distribution of seller costs. Moreover, the inverse demand curve has at least one and possibly multiple flat segments, leading to discontinuities in the profit function. Thus, small changes in the environment can lead to large changes in the optimal fee and market participation.

Number of Pages in PDF File: 31

Keywords: Platforms, Intermediaries, Networks, Bidding, Internet markets, Auctions

JEL Classification: D4, L1

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Date posted: March 7, 2007  

Suggested Citation

Deltas, George and Jeitschko, Thomas D., Auction Hosting Site Pricing and Market Equilibrium with Endogenous Bidder and Seller Participation (March 2007). Available at SSRN: http://ssrn.com/abstract=967736 or http://dx.doi.org/10.2139/ssrn.967736

Contact Information

George Deltas (Contact Author)
University of Illinois at Urbana-Champaign - Department of Economics ( email )
1206 South Sixth Street
450 Commerce West
Champaign, IL 61820
United States
217-333-4586 (Phone)
217-244-6678 (Fax)
Thomas D. Jeitschko
Michigan State University - Department of Economics ( email )
110 Marshall-Adams Hall
East Lansing, MI 48824
United States
517-355-8302 (Phone)
517-432-1068 (Fax)
HOME PAGE: http://www.msu.edu/~jeitschk/
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