The Effect of Competition on eBay
41 Pages Posted: 21 May 2014 Last revised: 13 Jun 2015
Date Written: January 29, 2015
I examine the effect of competition on eBay Motors. I specify a simple model of auction choice and show that the expected transaction price falls with an increase in the number of competitors. I then test for this effect using data from 5,500 auctions for Chevrolet Corvettes. To address potential endogeneity of the level of competition, I introduce an instrument which takes advantage of the unique features of eBay. Results indicate that an additional competitor leads to a 6% reduction in the final transacted price ($960 for the average car). Further, I provide evidence that this effect is due to the thinning of the bidder market rather than dynamic bidding.
Keywords: Auctions, eBay, Simultaneous Auctions, Auction Choice, Endogenous Entry
JEL Classification: L11, L13, D44
Suggested Citation: Suggested Citation